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Personal Data

Christoph Helmut Keitel

birth30 July 1965, Lübeck, Germany
citizenshipGerman
addressMax-Planck-Institut für Kernphysik (MPIK)
Max Planck Institute for Nuclear Physics
Saupfercheckweg 1
69117 Heidelberg
Germany
emailkeitelmpi-hd.mpgde
fax+ 49 (0)6221 516-152
phone+ 49 (0)6221 516-150,
Executive Assistant: Sibel Babacan, -151

Education History

2005-presentHeidelberg University, Germany: honorary professor ("Honorarprofessor") at the Faculty of Physics and Astronomy
2000-2005University of Freiburg, Germany: lecturer ("Privatdozent") at the faculty of physics
1998-2000University of Freiburg, Germany: Habilitation and Venia Legendi in physics. Topic: Atomic systems in intense laser fields.
1991-1992University of Munich, Germany: PhD in physics. Thesis topic: Lasing without inversion and refraction without absorption. Supervision by Profs. M. O. Scully and L. M. Narducci (official G. Süssmann)
1987-1990University of Munich, Germany: Diplom (MS) in physics. Thesis topic: Triggered superradiance (Supervisor Prof. Dr. G. Süssmann)
1985-1987Leibniz Universität Hannover, Germany: "Vordiplom" (BS) both in physics and mathematics
1971-1985School till Abitur (high school graduation) followed by 15 months of military service

Employment History

2004-presentDirector, Max-Planck-Institut für Kernphysik (MPIK, Max Planck Institute for Nuclear Physics), Heidelberg, Germany
2003-2004Lecturer of Physics ("Hochschuldozent") at the University of Freiburg (SS 03, C2) and Heinrich Heine University Düsseldorf (WS 03/04, C4), Germany
1998-2003Project Leader ("Nachwuchsgruppenleiter") "Theory of atomic systems in intense laser fields" at the DFG funded Special Research Area 276, Faculty of Physics at the University of Freiburg, Germany
1997-1998Marie Curie Fellow, Institute for Theoretical Physics, University of Innsbruck, Austria (with Prof. P. Zoller)
1992-1997Post-doctoral Research Associate, Optics Section, Blackett Laboratory, Imperial College, London SW7 2BZ, UK (with Prof. Sir P. L. Knight FRS)
1989-1992Research Assistant (Associate since 1991), Center for Advanced Studies, University of New Mexico, Albuquerque, NM 87131, USA (with Prof. M. O. Scully)
summers 1990/91/92Research Fellowship, Max-Planck-Institut für Quantenoptik (Max Planck Institute for Quantum Optics), Garching (Munich), Germany (with Prof. M. O. Scully and Prof. H. Walther)

Community Services

2008-presentAdvisory Board member of ELI (Extreme Light Infrastructure), in particular ELI Beamlines (Czech Republic) and ELI Nuclear Physics (Romania)
2006-2008Managing Director of the Max-Planck-Institut für Kernphysik (MPIK, Max Planck Institute for Nuclear Physics) (regular 3 year term), Heidelberg, Germany
2006-2008Member of the Regional Coordination Committee
2004-presentFounding Speaker of the International Max Planck Research School for Quantum Dynamics in Physics, Chemistry and Biology (IMPRS-QD) (opening of the graduate school: 2007)
1991-presentReviewer for numerous scientific publishing companies (journals & books) and for various national and international scientific funding bodies

Awards

2008APS "Outstanding Referee" Award
2006Fellow of Optical Society of America
2003Gustav Hertz Prize of the German Physical Society
(Further information see DPG Press release/Pressemitteilungen 12.2.2003)
1998SFB Junior Research Group
1997European Union Marie Curie Fellow
1988Fellow of "Studienstiftung des Deutschen Volkes"

Publications in refereed international journals

1.359 Polarized Positron Beams via Intense Two-Color Laser Pulses

Y. Chen, P. He, R. Shaisultanov, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 123, 174801 (2019)

1.358 Roadmap on STIRAP applications

K. Bergmann, H. Nägerl, C. Panda, G. Gabrielse, E. Miloglyadov, M. Quack, G. Seyfang, G. Wichmann, S. Ospelkaus, A. Kuhn, S. Longhi, A. Szameit, P. Pirro, B. Hillebrands, X. Zhu, J. Zhu, M. Drewsen, W. K. Hensinger, S. Weidt, T. Halfmann, H. Wang, G. S. Paraoanu, N. V. Vitanov, J. Mompart, T. Busch, T. J. Barnum, D. D. Grimes, R. W. Field, M. G. Raizen, E. Narevicius, M. Auzinsh, D. Budker, A. Pálffy, and C. H. Keitel
Journal of Physics B: Atomic, Molecular and Optical Physics 52, 202001 (2019)

1.357 Holographic interferences in strong-field ionization beyond the dipole approximation: The influence of the peak and focal-volume-averaged laser intensities

B. Willenberg, J. Maurer, U. Keller, J. Daněk, M. Klaiber, N. Teeny, K.Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 100, 033417 (2019)

1.356 g Factor of Boronlike Argon 40Ar13+

I. Arapoglou, A. Egl, M. Höcker, T. Sailer, B. Tu, A. Weigel, R. Wolf, H. Cakir, V. A. Yerokhin, N. Oreshkina, V. A. Agababaev, A. V. Volotka, D. V. Zinenko, D. A. Glazov, Z. Harman, C. H. Keitel, S. Sturm, and K. Blaum
Physical Review Letters 122, 253001 (2019)

1.355 93mMo Isomer Depletion via Beam-Based Nuclear Excitation by Electron Capture

Y. Wu, C. H. Keitel, and A. Pálffy
Physical Review Letters 122, 212501 (2019)

1.354 Polarized Laser-WakeField-Accelerated Kiloampere Electron Beams

M. Wen, M. Tamburini, and C. H. Keitel
Physical Review Letters 122, 214801 (2019)

1.353 Semiclassical limitations for photon emission in strong external fields

E. Raicher, S. Eliezer, C. H. Keitel, and K. Z. Hatsagortsyan
Physical Review A 99, 052513 (2019)

1.352 Polarized Light from the Transportation of a Matter-Antimatter Beam in a Plasma

U. Sinha, C. H. Keitel, and N. Kumar
Physical Review Letters 122, 204801 (2019)

1.351 Ultrarelativistic Electron-Beam Polarization in Single-Shot Interaction with an Ultraintense Laser Pulse

Y. Li, R. Shaisultanov, K. Z. Hatsagortsyan, F. Wan, C. H. Keitel, and J. Li
Physical Review Letters 122, 154801 (2019)

1.350 Nonlinear Compton scattering of an ultraintense laser pulse in a plasma

F. Mackenroth, N. Kumar, N. Neitz, and C. H. Keitel
Physical Review E 99, 033205 (2019)

1.349 Generation of twisted γ-ray radiation by nonlinear Thomson scattering of twisted light

Y. Chen, K. Z. Hatsagortsyan, and C. H. Keitel
Matter and Radiation at Extremes 4, 024401 (2019)

1.348 Improved local-constant-field approximation for strong-field QED codes

A. Di Piazza, M. Tamburini, S. Meuren, and C. H. Keitel
Physical Review A 99, 022125 (2019)

1.347 Role of high ponderomotive energy in laser-induced nonsequential double ionization

T. Shaaran, N. Camus, J. Dura, L. Fechner, A. Thai, A. Britz, M. Baudisch, T. Steinle, A. Senftleben, C. D. Schröter, J. Ullrich, T. Pfeifer, C. H. Keitel, J. Biegert, K. Z. Hatsagortsyan, and R. Moshammer
Physical Review A 99, 023421 (2019)

1.346 Determining the carrier-envelope phase of relativistic laser pulses via electron-momentum distribution

Y. Li, J. Li, K. Z. Hatsagortsyan, Y. Zhao, B. Zhang, Y. Li, Y. Liu, Z. Zhang, Z. Xu, and C. H. Keitel
Physical Review A 99, 013850 (2019)

1.345 Resonance strengths for KLL dielectronic recombination of highly charged mercury ions and improved empirical Z-scaling law

Z. Harman, C. Shah, A. J. González Martínez, U. D. Jentschura, H. Tawara, C. H. Keitel, J. H. Ullrich, and J. R. Crespo López-Urrutia
Physical Review A 99, 012506 (2019)

1.344 High-energy direct photoelectron spectroscopy in strong-field ionization

P. He, M. Klaiber, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 98, 053428 (2018)

1.343 Electron-angular-distribution reshaping in the quantum radiation-dominated regime

Y. Li, Y. Zhao, K. Z. Hatsagortsyan, C. H. Keitel, and J. Li
Physical Review A 98, 052120 (2018)

1.342 Real-Time Reconstruction of the Strong-Field-Driven Dipole Response

V. Stooß, S. Cavaletto, S. Donsa, A. Blättermann, P. Birk, C. H. Keitel, I. Brezinová, J. Burgdörfer, C. Ott, and T. Pfeifer
Physical Review Letters 121, 173005 (2018)

1.341 γ-Ray Beams with Large Orbital Angular Momentum via Nonlinear Compton Scattering with Radiation Reaction

Y. Chen, J. Li, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 121, 074801 (2018)

1.340 Coulomb effect in laser-induced recollision excitation

T. Shaaran, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 98, 023410 (2018)

1.339 Implementing nonlinear Compton scattering beyond the local-constant-field approximation

A. Di Piazza, M. Tamburini, S. Meuren, and C. H. Keitel
Physical Review A 98, 012134 (2018)

1.338 Experimental Signatures of the Quantum Nature of Radiation Reaction in the Field of an Ultraintense Laser

K. Poder, M. Tamburini, G. Sarri, A. Di Piazza, S. Kuschel, C. D. Baird, K. Behm, S. Bohlen, J. M. Cole, D. J. Corvan, M. Duff, E. Gerstmayr, C. H. Keitel, K. Krushelnick, S. P. D. Mangles, P. McKenna, C. D. Murphy, Z. Najmudin, C. P. Ridgers, G. M. Samarin, D. R. Symes, A. G. R. Thomas, J. Warwick, and M. Zepf
Physical Review X 8, 031004 (2018)

1.337 Nuclear excitation by electron capture in optical-laser-generated plasmas

J. Gunst, Y. Wu, C. H. Keitel, and A. Pálffy
Physical Review E 97, 063205 (2018)

1.336 Analytical approach to Coulomb focusing in strong-field ionization. I. Nondipole effects

J. Daněk, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 97, 063409 (2018)

1.335 Analytical approach to Coulomb focusing in strong-field ionization. II. Multiple recollisions

J. Daněk, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 97, 063410 (2018)

1.334 Interplay between Coulomb-focusing and non-dipole effects in strong-field ionization with elliptical polarization

J. Daněk, M. Klaiber, K. Z. Hatsagortsyan, C. H. Keitel, B. Willenberg, J. Mauer, B. W. Mayer, C. R. Phillips, L. Gallmann, and U. Keller
Journal of Physics B: Atomic, Molecular and Optical Physics 51, 114001 (2018)

1.333 Giant collimated gamma-ray flashes

A. Benedetti, M. Tamburini, and C. H. Keitel
Nature Photonics 12, 319-323 (2018)

1.332 Single-Shot Carrier-Envelope Phase Determination of Long Superintense Laser Pulses

J. Li, Y. Chen, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 120, 124803 (2018)

1.331 Tailoring Laser-Generated Plasmas for Efficient Nuclear Excitation by Electron Capture

Y. Wu, J. Gunst, C. H. Keitel, and A. Pálffy
Physical Review Letters 120, 052504 (2018)

1.330 Probing the ionization wave packet and recollision dynamics with an elliptically polarized strong laser field in the nondipole regime

J. Mauer, B. Willenberg, J. Daněk, B. W. Mayer, C. R. Phillips, L. Gallmann, M. Klaiber, K. Z. Hatsagortsyan, C. H. Keitel, and U. Keller
Physical Review A 97, 013404 (2018)

1.329 Under-the-Tunneling-Barrier Recollisions in Strong-Field Ionization

M. Klaiber, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 120, 013201 (2018)

1.328 Improving the accuracy of the muon mass and magnetic moment anomaly via the bound-muon g factor

B. Sikora, H. Cakir, N. Michel, V. Debierre, N. Oreshkina, N. Belov, V. A. Yerokhin, C. H. Keitel, and Z. Harman
Physical Review D 97, 111301(R) (2018)

1.327 High-Energy Vacuum Birefringence and Dichroism in an Ultrastrong Laser Field

S. Bragin, S. Meuren, C. H. Keitel, and A. Di Piazza
Physical Review Letters 119, 250403 (2017)

1.326 Analytic model of a multi-electron atom

O. Skoromnik, I. D. Feranchuk, A. U. Leonau, and C. H. Keitel
Journal of Physics B: Atomic, Molecular and Optical Physics 50, 245007 (2017)

1.325 Spectral narrowing of x-ray pulses for precision spectroscopy with nuclear resonances

K. P. Heeg, A. Kaldun, C. Strohm, P. Reiser, C. Ott, R. Subramanian, D. Lentrodt, J. Haber, H.-C. Wille, S. Goerttler, R. Rüffer, C. H. Keitel, R. Röhlsberger, T. Pfeifer, and J. Evers
Science 357, 375-378 (2017)

1.324 Laser-pulse-shape control of seeded QED cascades

M. Tamburini, A. Di Piazza, and C. H. Keitel
Scientific Reports 7, 5694 (2017)

1.323 Experimental Evidence for Quantum Tunneling Time

N. Camus, E. Yakaboylu, L. Fechner, M. Klaiber, M. Laux, Y. Mi, K. Z. Hatsagortsyan, T. Pfeifer, C. H. Keitel, and R. Moshammer
Physical Review Letters 119, 023201 (2017)

1.322 Extraction of the electron mass from g-factor measurements on light hydrogenlike ions.

J. Zatorski, B. Sikora, S. G. Karshenboim, S. Sturm, F. Köhler, K. Blaum, C. H. Keitel, and Z. Harman
Physical Review A 96, 012502 (2017)

1.321 Plasma high-order-harmonic generation from ultraintense laser pulses

S. Tang, N. Kumar, and C. H. Keitel
Physical Review E 95, 051201(R) (2017)

1.320 Deterministic strong-field quantum control

S. Cavaletto, Z. Harman, T. Pfeifer, and C. H. Keitel
Physical Review A 95, 043413 (2017)

1.319 Spin-one-half particles in strong electromagnetic fields: Spin effects and radiation reaction

M. Wen, C. H. Keitel, and H. Bauke
Physical Review A 95, 042102 (2017)

1.318 Strong-field ionization via a high-order Coulomb-corrected strong-field approximation

M. Klaiber, J. Daněk, E. Yakaboylu, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 95, 023403 (2017)

1.317 Journeys from quantum optics to quantum technology

S. M. Barnett, A. Beige, A. Ekert, B. M. Garraway, C. H. Keitel, V. Kendon, M. Lein, G. J. Milburn, H. M. Moya-Cessa, M. Murao, J. K. Pachos, G. M. Palma, E. Paspalakis, S. J. D. Phoenix, B. Piraux, M. B. Plenio, B. C. Sanders, J. Twamley, A. Vidiella-Barranco, and M. S. Kim
Progress in Quantum Electronics 54, 19-45 (2017)

1.316 Hyperfine splitting in simple ions for the search of the variation of fundamental constants

N. Oreshkina, S. Cavaletto, N. Michel, Z. Harman, and C. H. Keitel
Physical Review A 96, 030501(R) (2017)

1.315 Theoretical prediction of the fine and hyperfine structure of heavy muonic atoms

N. Michel, N. Oreshkina, and C. H. Keitel
Physical Review A 96, 032510 (2017)

1.314 X-ray-generated heralded macroscopical quantum entanglement of two nuclear ensembles

W. Liao, C. H. Keitel, and A. Pálffy
Scientific Reports 6, 33361 (2016)

1.313 Identifying the Stern-Gerlach force of classical electron dynamics

M. Wen, H. Bauke, and C. H. Keitel
Scientific Reports 6, 31624 (2016)

1.312 Virtual-detector approach to tunnel ionization and tunneling times

N. Teeny, C. H. Keitel, and H. Bauke
Physical Review A 94, 022104 (2016)

1.311 Weighted difference of g factors of light Li-like and H-like ions for an improved determination of the fine-structure constant

V. A. Yerokhin, E. Berseneva, Z. Harman, I. I. Tupitsyn, and C. H. Keitel
Physical Review A 94, 022502 (2016)

1.310 Multi-pair states in electron-positron pair creation

A. Wöllert, H. Bauke, and C. H. Keitel
Physics Letters B 760, 552-557 (2016)

1.309 Logical operations with single x-ray photons via dynamically-controlled nuclear resonances

J. Gunst, C. H. Keitel, and A. Pálffy
Scientific Reports 6, 25136 (2016)

1.308 Semiclassical picture for electron-positron photoproduction in strong laser fields

S. Meuren, C. H. Keitel, and A. Di Piazza
Physical Review D 93, 085028 (2016)

1.307 Tailoring superradiance to design artificial quantum systems

P. Longo, C. H. Keitel, and J. Evers
Scientific Reports 6, 23628 (2016)

1.306 g Factor of Light Ions for an Improved Determination of the Fine-Structure Constant

V. A. Yerokhin, E. Berseneva, Z. Harman, I. I. Tupitsyn, and C. H. Keitel
Physical Review Letters 116, 100801 (2016)

1.305 Fields of an ultrashort tightly focused laser pulse

J. Li, Y. Salamin, K. Z. Hatsagortsyan, and C. H. Keitel
Journal of the Optical Society of America B-Optical Physics 33, 405-411 (2016)

1.304 Ionization Time and Exit Momentum in Strong-Field Tunnel Ionization

N. Teeny, E. Yakaboylu, H. Bauke, and C. H. Keitel
Physical Review Letters 116, 063003 (2016)

1.303 Bosonic pair creation and the Schiff-Snyder-Weinberg effect

Q. Z. Lv, H. Bauke, Q. Su, C. H. Keitel, and R. Grobe
Physical Review A 93, 012119 (2016)

1.302 High Field Physics and QED Experiments at ELI-NP

I.C.E. Turcu, F. Negoita, D.A. Jaroszynski, P. McKenna, S. Balascuta, D. Ursescu, I. Dancus, M.O. Cernaianu, M.V. Tataru, P. Ghenuche, D. Stutman, A. Boianu, M. Risca, M. Toma, C. Petcu, G. Acbas, S.R. Yoffe, A. Noble, B. Ersfeld, E. Brunetti, R. Capdessus, C. Murphy, C.P. Ridgers, D. Neely, S.P.D. Mangles, R. J. Gray, A.G.R. Thomas, J. G Kirk, A. Ilderton, M. Marklund, D.F. Gordon, B. Hafizi, D. Kaganovich, J.P. Palastro, E. D’Humieres, M. Zepf, G. Sarri, H. Gies, F. Karbstein, J. Schreiber, G.G. Paulus, B. Dromey, C. Harvey, A. Di Piazza, C. H. Keitel, M.C. Kaluza, S. Gales, and N.V. Zamfir
Romanian Reports in Physics 68, S145-S231 (2016)

1.301 Regularization of ultraviolet divergence for a particle interacting with a scalar quantum field

O. Skoromnik, I. D. Feranchuk, D. V. Lu, and C. H. Keitel
Physical Review D 92, 125019 (2015)

1.300 Direct and secondary nuclear excitation with x-ray free-electron lasers

J. Gunst, Y. Wu, N. Kumar, C. H. Keitel, and A. Pálffy
Physics of Plasmas 22, 112706 (2015)

1.299 Attosecond Gamma-Ray Pulses via Nonlinear Compton Scattering in the Radiation-Dominated Regime

J. Li, K. Z. Hatsagortsyan, B. J. Galow, and C. H. Keitel
Physical Review Letters 115, 204801 (2015)

1.298 Influence of ion movement in a particle trap on the bound electron g factor

N. Michel, J. Zatorski, and C. H. Keitel
Physical Review A 92, 052509 (2015)

1.297 Overview of laser-driven generation of electron-positron beams

G. Sarri, M. E. Dieckmann, I. Kourakis, A. Di Piazza, B. Reville, C. H. Keitel, and M. Zepf
Journal of Plasma Physics 81, 455810401 (2015)

1.296 Population inversion in two-level systems possessing permanent dipoles

M. Macovei, M. Mishra, and C. H. Keitel
Physical Review A 92, 013846 (2015)

1.295 Phase reconstruction of strong-field excited systems by transient-absorption spectroscopy

Z. Liu, S. Cavaletto, C. Ott, K. Meyer, Y. Mi, Z. Harman, C. H. Keitel, and T. Pfeifer
Physical Review Letters 115, 033003 (2015)

1.294 Feasibility of electron cyclotron autoresonance acceleration by a short terahertz pulse

Y. I. Salamin, J. Li, B. J. Galow, and C. H. Keitel
Optics Express 23, 17560-17567 (2015)

1.293 Spin polarized electron-positron pair production via elliptical polarized laser fields

A. Wöllert, H. Bauke, and C. H. Keitel
Physical Review D 91, 125026 (2015)

1.292 Nonlinear neutrino-photon interactions inside strong laser pulses

S. Meuren, C. H. Keitel, and A. Di Piazza
Journal of High Energy Physics 2015, 127 (2015)

1.291 Identifications of 5s1/2−5p3/2 and 5s2−5s5p EUV transitions of promethium-like Pt, Ir, Os and Re

H. Bekker, O. O. Versolato, A. Windberger, N. Oreshkina, R. Schupp, T. M. Baumann, Z. Harman, C. H. Keitel, P. O. Schmidt, J. Ullrich, and J. Crespo Lopez-Urrutia
Journal of Physics B 48, 144018 (2015)

1.290 Generation of neutral and high-density electron–positron pair plasmas in the laboratory

G. Sarri, K. Poder, J. M. Cole, W. Schumaker, A. Di Piazza, B. Reville, T. Dzelzainis, D. Doria, L. A. Gizzi, G. Grittani, S. Kar, C. H. Keitel, K. Krushelnick, S. Kuschel, S. P. D. Mangles, Z. Najmudin, N. Shukla, L. O. Silva, D. Symes, A. G. R. Thomas, M. Vargas, J. Vieira, and M. Zepf
Nature Communications 6, 6747 (2015)

1.289 Identification of the Predicted 5s−4f Level Crossing Optical Lines with Applications to Metrology and Searches for the Variation of Fundamental Constants

A. Windberger, J. R. Crespo López-Urrutia, H. Bekker, N. Oreshkina, J. C. Berengut, V. Bock, A. Borschevsky, V. A. Dzuba, E. Eliav, Z. Harman, U. Kaldor, S. Kaul, U. I. Safronova, V. V. Flambaum, C. H. Keitel, P. O. Schmidt, J. Ullrich, and O. O. Versolato
Physical Review Letters 114, 150801 (2015)

1.288 High-Energy Recollision Processes of Laser-Generated Electron-Positron Pairs

S. Meuren, K. Z. Hatsagortsyan, C. H. Keitel, and A. Di Piazza
Physical Review Letters 114, 143201 (2015)

1.287 Relativistic tunneling picture of electron-positron pair creation

A. Wöllert, M. Klaiber, H. Bauke, and C. H. Keitel
Physical Review D 91, 065022 (2015)

1.286 Tunneling Dynamics in Multiphoton Ionization and Attoclock Calibration

M. Klaiber, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 114, 083001 (2015)

1.285 Ion Acceleration by Short Chirped Laser Pulses

J. Li, B. J. Galow, C. H. Keitel, and Z. Harman
Applied Sciences 5, 36-47 (2015)

1.284 Polarization-operator approach to pair creation in short laser pulses

S. Meuren, K. Z. Hatsagortsyan, C. H. Keitel, and A. Di Piazza
Physical Review D 91, 013009 (2015)

1.283 Ultrahigh Brilliance Multi-MeV γ-Ray Beams from Nonlinear Relativistic Thomson Scattering

G. Sarri, D. J. Corvan, W. Schumaker, J. Cole, A. Di Piazza, H. Ahmed, C. Harvey, C. H. Keitel, K. Krushelnick, S. P. D. Mangles, Z. Najmudin, D. Symes, A. G. R. Thomas, M. Yeung, Z. Zhao, and M. Zepf
Physical Review Letters 113, 224801 (2014)

1.282 Particle production reactions in laser-boosted lepton collisions

S. Müller, C. H. Keitel, and C. Müller
Physical Review D 90, 094008 (2014)

1.281 Quantum dynamics of a two-level emitter with modulated transition frequency

M. Macovei and C. H. Keitel
Physical Review A 90, 043838 (2014)

1.280 Electron-spin dynamics induced by photon spins

S. Ahrens, H. Bauke, C. H. Keitel, and R. Grobe
New Journal of Physics 16, 103028 (2014)

1.279 Astrophysical line diagnosis requires non-linear dynamical atomic modeling

N. Oreshkina, S. Cavaletto, C. H. Keitel, and Z. Harman
Physical Review Letters 113, 143001 (2014)

1.278 All-Electromagnetic Control of Broadband Quantum Excitations Using Gradient Photon Echoes

W. Liao, C. H. Keitel, and A. Pálffy
Physical Review Letters 113, 123602 (2014)

1.277 Generation of high-frequency combs locked to atomic resonances by quantum phase modulation

Z. Liu, C. Ott, S. Cavaletto, Z. Harman, C. H. Keitel, and T. Pfeifer
New Journal of Physics 16, 093005 (2014)

1.276 Robust Signatures of Quantum Radiation Reaction in Focused Ultrashort Laser Pulses

J. Li, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 113, 044801 (2014)

1.275 Plasma-Based Generation and Control of a Single Few-Cycle High-Energy Ultrahigh-Intensity Laser Pulse

M. Tamburini, A. Di Piazza, T. V. Liseykina, and C. H. Keitel
Physical Review Letters 113, 025005 (2014)

1.274 Broadband high-resolution X-ray frequency combs

S. Cavaletto, Z. Harman, C. Ott, C. Buth, T. Pfeifer, and C. H. Keitel
Nature Photonics 8, 520-523 (2014)

1.273 Relativistic spin operators in various electromagnetic environments

H. Bauke, S. Ahrens, C. H. Keitel, and R. Grobe
Physical Review A 89, 052101 (2014)

1.272 What is the relativistic spin operator?

H. Bauke, S. Ahrens, C. H. Keitel, and R. Grobe
New Journal of Physics 16, 043012 (2014)

1.271 Quasiclassical propagator of a relativistic particle via the path-dependent gauge potential

E. Yakaboylu, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 89, 032115 (2014)

1.270 High-precision measurement of the atomic mass of the electron

S. Sturm, F. Köhler, J. Zatorski, Z. Harman, G. Werth, C. H. Keitel, and K. Blaum
Nature 506, 467-470 (2014)

1.269 Dominant Secondary Nuclear Photoexcitation with the X-ray Free Electron Laser

J. Gunst, Y. A. Litvinov, C. H. Keitel, and A. Pálffy
Physical Review Letters 112, 082501 (2014)

1.268 Electron dynamics controlled via self-interaction

M. Tamburini, C. H. Keitel, and A. Di Piazza
Physical Review E 89, 021201 (2014)

1.267 Higgs boson creation in laser-boosted lepton collisions

S. Müller, C. H. Keitel, and C. Müller
Physics Letters B 730, 161-165 (2014)

1.266 Optical control of an atomic inner-shell x-ray laser

G. Darvasi, C. H. Keitel, and C. Buth
Physical Review A 89, 013823 (2014)

1.265 Relativistic features and time delay of laser-induced tunnel-ionization

E. Yakaboylu, M. Klaiber, H. Bauke, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 88, 063421 (2013)

1.264 Major role of multielectronic K-L intershell resonant recombination processes in Li- to O-like ions of Ar, Fe, and Kr

C. Beilmann, Z. Harman, P. H. Mokler, S. Bernitt, C. H. Keitel, J. Ullrich, and J. R. Crespo López-Urrutia
Physical Review A 88, 062706, 1-11 (2013)

1.263 X-ray frequency combs from optically controlled resonance fluorescence

S. Cavaletto, Z. Harman, C. Buth, and C. H. Keitel
Physical Review A 88, 063402 (2013)

1.262 Laser-driven generation of collimated ultra-relativistic positron beams

G. Sarri, W. Schumaker, A. Di Piazza, K. Poder, J. M. Cole, M. Vargas, D. Doria, S. Kushel, B. Dromey, G. Grittani, L. Gizzi, M. E. Dieckmann, A. Green, V. Chvykov, A. Maksimchuk, V. Yanovsky, Z. H. He, B. X. Hou, J. A. Nees, S. Kar, Z. Najmudin, A. G. R. Thomas, C. H. Keitel, K. Krushelnick, and M. Zepf
Plasma Physics and Controlled Fusion 55, 124017 (2013)

1.261 Nuclear-size self-energy and vacuum-polarization corrections to the bound-electron g factor

V. A. Yerokhin, C. H. Keitel, and Z. Harman
Journal of Physics B: Atomic, Molecular and Optical Physics 46, 245002 (2013)

1.260 Coronium in the laboratory: measuring the Fe XIV green coronal line by laser spectroscopy

K. Schnorr, V. Mäckel, N. Oreshkina, S. Augustin, F. R. Brunner, Z. Harman, C. H. Keitel, J. H. Ullrich, and J. R. Crespo López-Urrutia
The Astrophysical Journal, Supplement Series 776, 121 (2013)

1.259 Attosecond pulses at kiloelectronvolt photon energies from high-order-harmonic generation with core electrons

C. Buth, F. He, J. H. Ullrich, C. H. Keitel, and K. Z. Hatsagortsyan
Physical Review A 88, 033848 (2013)

1.258 High-quality multi-GeV electron bunches via cyclotron autoresonance

B. J. Galow, J. Li, Y. I. Salamin, Z. Harman, and C. H. Keitel
Physical Review Special Topics-Accelerators and Beams 16, 081302, 1-6 (2013)

1.257 Quantum interference effects in an ensemble of 229Th nuclei interacting with coherent light

S. Das, A. Pálffy, and C. H. Keitel
Physical Review C 88, 024601, 1-14 (2013)

1.256 Polarization operator for plane-wave background fields

S. Meuren, C. H. Keitel, and A. Di Piazza
Physical Review D 88, 013007 , 1-19 (2013)

1.255 The Kapitza-Dirac effect in the relativistic regime

S. Ahrens, H. Bauke, C. H. Keitel, and C. Müller
Physical Review A 88, 012115, 1-14 (2013)

1.254 Nuclear recollisions in laser-assisted α decay

H. M. Castañeda Cortés, C. Müller, C. H. Keitel, and A. Pálffy
Physics Letter B 723, 401-405 (2013)

1.253 A table-top laser-based source of femtosecond, collimated, ultra-relativistic positron beams

G. Sarri, W. Schumaker, A. Di Piazza, M. Vargas, B. Dromey, M. E. Dieckmann, V. Chvykov, A. Maksimchuk, V. Yanovsky, Z. H. He, B. X. Hou, J. A. Nees, A. G. R. Thomas, C. H. Keitel, M. Zepf, and K. Krushelnick
Physical Review Letters; American Physical Society., Woodbury, N.Y., etc. 110, 255002, 1-5 (2013)

1.252 A three-beam setup for coherently controlling nuclear state population

W. Liao, A. Pálffy, and C. H. Keitel
Physical Review C 87, 054609, 1-12 (2013)

1.251 Lorentz meets Fano spectral line shapes: A universal phase and its laser control

C. Ott, A. Kaldun, P. Raith, K. Meyer, M. Laux, J. Evers, C. H. Keitel, C. H. Greene, and T. Pfeifer
Science 340, 716-720 (2013)

1.250 Collapse-and-revival dynamics of strongly laser-driven electrons

O. Skoromnik, I. D. Feranchuk, and C. H. Keitel
Physical Review A 87, 052107, 1-16 (2013)

1.249 Under-the-barrier dynamics in laser-induced relativistic tunneling

M. Klaiber, E. Yakaboylu, H. Bauke, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 110, 153004, 1-5 (2013)

1.248 Interference-induced peak splitting in EUV superfluorescence

N. Cui, C. H. Keitel, and M. Macovei
Optics Letters 38, 570-572 (2013)

1.247 X-ray quantum optics

B. W. Adams, C. Buth, S. Cavaletto, J. Evers, Z. Harman, C. H. Keitel, A. Pálffy, A. Picón, R. Röhlsberger, Y. Rostovtsev, and K. Tamasaku
Journal of Modern Optics 60, 2-21 (2013)

1.246 Negative refraction with tunable absorption in an active dense gas of atoms

P. P. Orth, R. Hennig, C. H. Keitel, and J. Evers
New Journal of Physics 15, 013027, 1-18 (2013)

1.245 Coherence-enhanced optical determination of the 229Th isomeric transition

W. Liao, S. Das, C. H. Keitel, and A. Pálffy
Physical Review Letters 109, 262502, 1-5 (2012)

1.244 An unexpectedly low oscillator strength as the origin of the Fe XVII emission problem

S. Bernitt, G. V. Brown, J. K. Rudolph, R. F. Steinbrügge, A. Graf, M. Leutenegger, S. Epp, S. Eberle, K. Kubicek, V. Mäckel, M. C. Simon, E. Träbert, E. W. Magee, C. Beilmann, N. Hell, S. Schippers, A. Müller, S. M. Kahn, A. Surzhykov, Z. Harman, C. H. Keitel, J. Clementson, F. S. Porter, W. Schlotter, J. J. Turner, J. H. Ullrich, P. Beiersdorfer, and J. R. Crespo López-Urrutia
Nature 492, 225-228 (2012)

1.243 Coherent Storage and Phase Modulation of Single Hard-X-Ray Photons Using Nuclear Excitons

W. Liao, A. Pálffy, and C. H. Keitel
Physical Review Letters 109, 197403 (2012)

1.242 Photon-photon scattering in collisions of laser pulses

B. King and C. H. Keitel
New Journal of Physics 14, 103002, 1-22 (2012)

1.241 Cooperative effects in nuclear excitation with coherent x-ray light

A. Junker, A. Palffy, and C. H. Keitel
New Journal of Physics 14, 085025, 1-21 (2012)

1.240 Extremely high-intensity laser interactions with fundamental quantum systems

A. Di Piazza, C. Müller, K. Z. Hatsagortsyan, and C. H. Keitel
Reviews of Modern Physics 84, 1177-1228 (2012)

1.239 Spin Dynamics in the Kapitza-Dirac Effect

S. Ahrens, H. Bauke, C. H. Keitel, and C. Müller
Physical Review Letters 109, 043601, 1-5 (2012)

1.238 Laser acceleration of proton bunches by petawatt chirped linearly polarized laser pulses

J. Li, Y. Salamin, B. J. Galow, Z. Harman, and C. H. Keitel
Physical Review A 85, 063831, 1-11 (2012)

1.237 Optimization of the recollision step in high-order harmonic generation

M. Klaiber, M. C. Kohler, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 85, 063829, 1-8 (2012)

1.236 Acceleration of proton bunches by petawatt chirped radially polarized laser pulses

J. Li, Y. I. Salamin, B. J. Galow, and C. H. Keitel
Physical Review A 85, 063832, 1-12 (2012)

1.235 Manipulating the Annihilation Dynamics of Positronium via Collective Radiation

N. Cui, M. Macovei, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 108, 243401, 1-5 (2012)

1.234 Generation of correlated photon pairs in different frequency ranges

F. Oster, C. H. Keitel, and M. Macovei
Physical Review. A 85, 063814, 1-5 (2012)

1.233 QED calculation of the nuclear magnetic shielding for hydrogenlike ions

V. A. Yerokhin, K. Pachucki, Z. Harman, and C. H. Keitel
Physical Review. A 85, 022512 (2012)

1.232 Nuclear Shape Effect on the g Factor of Hydrogenlike Ions

J. Zatorski, N. Oreshkina, C. H. Keitel, and Z. Harman
Physical Review Letters 108, 063005, 1-5 (2012)

1.231 Coherent x-ray generation from below-threshold harmonics

J. Liu, M. C. Kohler, C. H. Keitel, and K. Z. Hatsagortsyan
Physical Review A 84, 063817 (2011)

1.230 Accelerating the Fourier split operator method via graphics processing units

H. Bauke and C. H. Keitel
Computer Physics Communications 182, 2454-2463 (2011)

1.229 Dense monoenergetic proton beams from chirped laser-plasma interaction

B. Galow, Y. I. Salamin, T. V. Liseykina, Z. Harman, and C. H. Keitel
Physical Review Letters 107, 185002 (2011)

1.228 Nuclear coherent population transfer with x-ray laser pulses

W. Liao, A. Pálffy, and C. H. Keitel
Physics Letters B 705, 134-138 (2011)

1.227 Prominent Higher-Order Contributions to Electronic Recombination

C. Beilmann, P. Mokler, S. Bernitt, C. H. Keitel, J. H. Ullrich, J. R. Crespo López-Urrutia, and Z. Harman
Physical Review Letters 107, 143201 (2011)

1.226 Time analysis of above-threshold ionization in extreme-ultraviolet laser pulses

H. Ebadi, C. H. Keitel, and K. Z. Hatsagortsyan
Physical Review. A 83, 063418 (2011)

1.225 QED Theory of the Nuclear Magnetic Shielding in Hydrogenlike Ions

V. A. Yerokhin, K. Pachucki, C. H. Keitel, and Z. Harman
Physical Review Letters 107, 043004 (2011)

1.224 Streaking at high energies with electrons and positrons

A. Ipp, J. Evers, C. H. Keitel, and K. Z. Hatsagortsyan
Physics Letters B 702, 383-387 (2011)

1.223 g Factor of Hydrogenlike 28Si13+

S. Sturm, A. Wagner, B. Schabinger, J. Zatorski, Z. Harman, W. Quint, G. Werth, C. H. Keitel, and K. Blaum
Physical review letters 107, 023002 (2011)

1.222 Higher-order resonant inter-shell electronic recombination for heavy highly charged ions

C. Beilmann, P. H. Mokler, S. Bernitt, Z. Harman, C. H. Keitel, O. Postavaru, J. H. Ullrich, and J. R. Crespo López-Urrutia
Physica Scripta T T144, 014014 (2011)

1.221 Relativistic ionization characteristics of laser-driven hydrogenlike ions

H. Bauke, H. Hetzheim, G. R. Mocken, M. Ruf, and C. H. Keitel
Physical Review. A 83, 063414 (2011)

1.220 Coherent control of the cooperative branching ratio for nuclear x-ray pumping

A. Pálffy, C. H. Keitel, and J. Evers
Physical review / B 83, 155103 (2011)

1.219 Phase-matched coherent hard X-rays from relativistic high-order harmonic generation

M. Kohler, M. Klaiber, K. Z. Hatsagortsyan, and C. H. Keitel
Europhysics letters 94, 14002 (2011)

1.218 Attochirp-free High-order Harmonic Generation

M. C. Kohler, C. H. Keitel, and K. Z. Hatsagortsyan
Optics Express 19, 4411-4420 (2011)

1.217 High-Precision Metrology of Highly Charged Ions via Relativistic Resonance Fluorescence

O. Postavaru, Z. Harman, and C. H. Keitel
Physical Review Letters 106, 033001 (2011)

1.216 High-order harmonic generation enhanced by XUV light

C. Buth, M. C. Kohler, J. H. Ullrich, and C. H. Keitel
Optics Letters 36, 3530-3532 (2011)

1.215 Radiation reaction effects on electron nonlinear dynamics and ion acceleration in laser-solid interaction

M. Tamburini, F. Pegoraro, A. Di Piazza, C. H. Keitel, T. V. Liseykina, and A. Macchi
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 653, 181-185 (2011)

1.214 Optimizing direct intense-field laser acceleration of ions

Z. Harman, Y. Salamin, B. Galow, and C. H. Keitel
Physical Review. A 84, 053814 (2011)

1.213 Radiation reaction effects on radiation pressure acceleration

M. Tamburini, F. Pegoraro, A. Di Piazza, C. H. Keitel, and A. Macchi
New Journal of Physics 12, 123005, 1-14 (2010)

1.212 Intense high-quality medical proton beams via laser fields

B. Galow, Z. Harman, and C. H. Keitel
Optics Express 18, 25950-25957 (2010)

1.211 Quantum Radiation Reaction Effects in Multiphoton Compton Scattering

A. Di Piazza, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 105, 220403, 1-4 (2010)

1.210 High Harmonic Generation Via Continuum Wave-Packet Interference

M. C. Kohler, C. Ott, P. Raith, R. Heck, I. Schlegel, C. H. Keitel, and T. Pfeifer
Physical Review Letters 105, 203902, 1-4 (2010)

1.209 Resonant and Near-Threshold Photoionization Cross Sections of Fe14+

M. C. Simon, J. R. C. Lopez-Urrutia, C. Beilmann, M. Schwarz, Z. Harman, S. W. Epp, B. L. Schmitt, T. M. Baumann, E. Behar, S. Bernitt, R. Follath, R. Ginzel, C. H. Keitel, R. Klawitter, K. Kubicek, V. Mackel, P. H. Mokler, G. Reichardt, O. Schwarzkopf, and J. Ullrich
Physical Review Letters 105, 183001 (2010)

1.208 Double-slit vacuum polarization effects in ultraintense laser fields

B. King, A. Di Piazza, and C. H. Keitel
Physical Review A 82, 032114 (2010)

1.207 Complete QED Theory of Multiphoton Trident Pair Production in Strong Laser Fields

H. Y. Hu, C. Müller, and C. H. Keitel
Physical Review Letters 105, 080401 (2010)

1.206 Determining the Carrier-Envelope Phase of Intense Few-Cycle Laser Pulses

F. Mackenroth, A. Di Piazza, and C. H. Keitel
Physical Review Letters 105, 063903 (2010)

1.205 Effect of a strong laser field on electron-positron photoproduction by relativistic nuclei

A. Di Piazza, E. Lötstedt, A. I. Milstein, and C. H. Keitel
Physical Review A 81, 062122 (2010)

1.204 Photoionization of N3+ and Ar8+ in an electron beam ion trap by synchrotron radiation

M. C. Simon, M. Schwarz, S. W. Epp, C. Beilmann, B. L. Schmitt, Z. Harman, T. M. Baumann, P. H. Mokler, S. Bernitt, R. Ginzel, S. G. Higgins, C. H. Keitel, R. Klawitter, K. Kubicek, V. Mäckel, J. Ullrich, and J. R. Crespo López-Urrutia
Journal of Physics B: Atomic, Molecular and Optical Physics 43, 065003, 1-11 (2010)

1.203 Squeezing in strong light scattered by a regular structure of atoms

L. L. Jin, M. Macovei, S. Q. Gong, C. H. Keitel, and J. Evers
Optics Communications 283, 790-794 (2010)

1.202 Nonperturbative multiphoton electron-positron-pair creation in laser fields

G. R. Mocken, M. Ruf, C. Müller, and C. H. Keitel
Physical Review A 81, 022122 (2010)

1.201 A matterless double slit

B. King, A. Di Piazza, and C. H. Keitel
Nature Photonics 4, 92-94 (2010)

1.200 Quantum entanglement in dense multiqubit systems

M. Macovei, J. Evers, and C. H. Keitel
Journal of Modern Optics 57, 1287-1292 (2010)

1.199 A real space split operator method for the Klein-Gordon equation

M. Ruf, H. Bauke, and C. H. Keitel
Journal of Computational Physics 228, 9092-9106 (2009)

1.198 Isotope shifts in dielectronic recombination : From stable to in-flight-produced nuclei

C. Brandau, C. Kozhuharov, A. Müller, D. Bernhardt, S. Böhm, D. Boutin, F. J. Currell, C. Dimopoulou, B. Franzke, Z. Harman, J. D. Jentschura, C. H. Keitel, H. J. Kluge, Y. S. Kozhedub, R. Krücken, Y. A. Litvinov, F. Nolden, B. O'Rourke, R. Reuschl, S. Schippers, V. M. Shabaev, U. Spillmann, Z. Stachura, M. Steck, T.. Stöhlker, I. I. Tupitsyn, D. F. Winters, and A. Wolf
Journal of Physics: Conference Series 194, 012023 (2009)

1.197 Intershell trielectronic recombination with K-shell excitation in Kr30+

C. Beilmann, O. Postavaru, L. H. Arntzen, R. Ginzel, C. H. Keitel, V. Mackel, P. H. Mokler, M. C. Simon, H. Tawara, I. I. Tupitsyn, J. Ullrich, J. R. Crespo López-Urrutia, and Z. Harman
Physical Review A 80, 050702 (2009)

1.196 Laser-guided relativistic quantum dynamics

C. Liu, M. C. Kohler, K. Z. Hatsagortsyan, C. Müller, and C. H. Keitel
New Journal of Physics 11, 105045 (2009)

1.195 Barrier Control in Tunneling e(+)-e(-) Photoproduction

A. Di Piazza, E. Lötstedt, A. I. Milstein, and C. H. Keitel
Physical Review Letters 103, 170403 (2009)

1.194 Yoctosecond Photon Pulses from Quark-Gluon Plasmas

A. Ipp, C. H. Keitel, and J. Evers
Physical Review Letters 103, 152301 (2009)

1.193 Probing quantum superposition states with few-cycle laser pulses

X. T. Xie, M. Macovei, M. Kiffner, and C. H. Keitel
Journal of the Optical Society of America B -Optical Physics 26, 1912-1917 (2009)

1.192 Exotic atoms in superintense laser fields : applications in atomic, nuclear, and particle physics

C. Müller, A. Shahbaz, T. J. Bürvenich, K. Z. Hatsagortsyan, and C. H. Keitel
European Physical Journal - Special Topics 175, 187-190 (2009)

1.191 Relativistic nonperturbative above-threshold phenomena in strong laser fields

C. Müller, K. Z. Hatsagortsyan, M. Ruf, S. J. Müller, H. G. Hetzheim, M. C. Kohler, and C. H. Keitel
Laser Physics 19, 1743-1752 (2009)

1.190 Single-Photon Entanglement in the keV Regime via Coherent Control of Nuclear Forward Scattering

A. Pálffy, C. H. Keitel, and J. Evers
Physical Review Letters 103, 017401 (2009)

1.189 Canonical transforms and the efficient integration of quantum mechanical wave equations

H. Bauke and C. H. Keitel
Physical Review E 80, 016706 (2009)

1.188 Spontaneous emission interference in negative-refractive-index waveguides

G. X. Li, J. Evers, and C. H. Keitel
Physical Review B 80, 045102 (2009)

1.187 Strong Signatures of Radiation Reaction below the Radiation-Dominated Regime

A. Di Piazza, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 102, 254802 (2009)

1.186 Laser-induced nonresonant nuclear excitation in muonic atoms

A. Shahbaz, C. Müller, T. J. Bürvenich, and C. H. Keitel
Nuclear Physics A 821, 106-117 (2009)

1.185 Lepton pair production in high-frequency laser fields

C. Müller, C. Deneke, M. Ruf, G. R. Mocken, K. Z. Hatsagortsyan, and C. H. Keitel
Laser Physics 19, 791-796 (2009)

1.184 Ionization Dynamics versus Laser Intensity in Laser-Driven Multiply Charged Ions

H. G. Hetzheim and C. H. Keitel
Physical Review Letters 102, 083003 (2009)

1.183 Pair Production in Laser Fields Oscillating in Space and Time

M. Ruf, G. R. Mocken, C. Müller, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 102, 080402 (2009)

1.182 Coulomb-field-induced conversion of a high-energy photon into a pair assisted by a counterpropagating laser beam

E. Lötstedt, U. D. Jentschura, and C. H. Keitel
New Journal of Physics 11, 013054 (2009)

1.181 Antimatter: Abundant positron production

C. Müller and C. H. Keitel
Nature Photonics 3, 245-246 (2009)

1.180 Robust coherent preparation of entangled states of two coupled flux qubits via dynamic control of the transition frequencies

K. Y. Xia, M. Macovei, J. Evers, and C. H. Keitel
Physical Review B 79, 024519 (2009)

1.179 Correlated atomic population fluctuations via the environmental reservoir

M. Macovei, Y. P. Niu, S. Q. Gong, and C. H. Keitel
Journal of Modern Optics 56, 704-709 (2009)

1.178 Laser photon merging in proton laser collisions

A. Di Piazza, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review. A 78, 062109 (2008)

1.177 Laser channeling of Bethe-Heitler pairs

E. Lötstedt, U. D. Jentschura, and C. H. Keitel
Physical Review Letters 101, 203001, 1-4 (2008)

1.176 Muon pair creation from positronium in a linearly polarized laser field

C. Müller, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 78, 033408, 1-19 (2008)

1.175 Muon-pair creation by two x-ray laser photons in the field of an atomic nucleus

C. Müller, C. Deneke, and C. H. Keitel
Physical Review Letters 101, 060402, 1-4 (2008)

1.174 Photon polarization as a probe for quark-gluon plasma dynamics

A. Ipp, A. Di Piazza, J. Evers, and C. H. Keitel
Physics Letters B 666, 315-319 (2008)

1.173 Laser-driven relativistic recollisions

K. Z. Hatsagortsyan, M. Klaiber, C. Müller, M. C. Kohler, and C. H. Keitel
Journal of the Optical Society of America B-Optical Physics 25, B92-B103 (2008)

1.172 FFT-split-operator code for solving the Dirac equation in 2+1 dimensions

G. R. Mocken and C. H. Keitel
Computer Physics Communications 178, 868-882 (2008)

1.171 Direct high-power laser acceleration of ions for medical applications

Y. I. Salamin, Z. Harman, and C. H. Keitel
Physical Review Letters 100, 155004, 1-4 (2008)

1.170 Photoemission of a single-electron wave packet in a strong laser field

J. Peatross, C. Müller, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 100, 153601, 1-4 (2008)

1.169 Electric-dipole-forbidden nuclear transitions driven by super-intense laser fields

A. Pálffy, J. Evers, and C. H. Keitel
Physical Review C 77, 044602, 1-9 (2008)

1.168 Spatially entangled atomic deflections in twin-photon light beams

G. Y. Kryuchkyan, M. Macovei, and C. H. Keitel
Physical Review A 77, 035603, 1-4 (2008)

1.167 High-energy, nuclear and QED processes in strong laser fields

C. Müller, A. Di Piazza, A. Shahbaz, T. J. Bürvenich, J. Evers, K. Z. Hatsagortsyan, and C. H. Keitel
Laser Physics 18, 175-184 (2008)

1.166 Nuclear excitation by electron capture followed by fast x-ray emission

A. Pálffy, Z. Harman, C. Kozhuharov, C. Brandau, C. H. Keitel, W. Scheid, and T. Stöhlker
Physics Letters B 661, 330-334 (2008)

1.165 Isotope shift in the dielectronic recombination of three-electron ANd57+

C. Brandau, C. Kozhuharov, Z. Harman, A. Müller, S. Schippers, Y. S. Kozhedub, D. Bernhardt, S. Böhm, J. Jacobi, E. W. Schmidt, P. H. Mokler, F. Bosch, H.-J. Kluge, T. Stöhlker, K. Beckert, P. Beller, F. Nolden, M. Steck, A. Gumberidze, R. Reuschl, U. Spillmann, F. J. Currell, I. I. Tupitsyn, V. M. Shabaev, U. D. Jentschura, C. H. Keitel, A. Wolf, and Z. Stachura
Physical Review Letters 100, 073201 (2008)

1.164 Coherent hard x rays from attosecond pulse train-assisted harmonic generation

M. Klaiber, K. Z. Hatsagortsyan, C. Müller, and C. H. Keitel
Optics Letters 33, 411-413 (2008)

1.163 Particle physics with a laser-driven positronium atom

C. Müller, K. Z. Hatsagortsyan, and C. H. Keitel
Physics Letters B 659, 209-213 (2008)

1.162 Nonperturbative vacuum-polarization effects in proton-laser collisions

A. Di Piazza, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 100, 010403 (2008)

1.161 Zeeman splitting and g factor of the 1s22s22p 2P3/2 and 2P1/2 levels in Ar13+

R. Soria Orts, J. R. Crespo López-Urrutia, H. Bruhns, A. J. G. Martinez, Z. Harman, U. D. Jentschura, C. H. Keitel, A. Lapierre, H. Tawara, I. I. Tupitsyn, J. Ullrich, and A. V. Volotka
Physical Review A 76, 052501 (2007)

1.160 Isomer triggering via nuclear excitation by electron capture

A. Palffy, J. Evers, and C. H. Keitel
Physical Review Letters 99, 172502 (2007)

1.159 Photon splitting in a laser field

A. Di Piazza, A. I. Milstein, and C. H. Keitel
Physical Review A 76, 032103 (2007)

1.158 Breakdown of the few-level approximation in collective systems

M. Kiffner, J. Evers, and C. H. Keitel
Physical Review A 76, 013807 (2007)

1.157 Nuclear signatures in high-order harmonic generation from laser-driven muonic atoms

A. Shahbaz, C. Müller, A. Staudt, T. J. Burvenich, and C. H. Keitel
Physical Review Letters 98, 263901 (2007)

1.156 Fully relativistic laser-induced ionization and recollision processes

M. Klaiber, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 75, 063413 (2007)

1.155 Superbunched photons via a strongly pumped near-equispaced multiparticle system

M. Macovei and C. H. Keitel
Physical Review B 75, 245325 (2007)

1.154 Electron wave-packet dynamics in a relativistic electromagnetic field: 3-D analytical approximation

J. Peatross, C. Müller, and C. H. Keitel
Optics Express 15, 6053-6061 (2007)

1.153 Laser-assisted bremsstrahlung for circular and linear polarization

S. Schnez, E. Lötstedt, U. D. Jentschura, and C. H. Keitel
Physical Review A 75, 053412 (2007)

1.152 Nonlinear interaction of strong laser fields in vacuum

A. Di Piazza, K. Z. Hatsagortsyan, and C. H. Keitel
Laser Physics 17, 345-349 (2007)

1.151 Strongly enhanced high-harmonic generation via antisymmetric ionic states

R. Fischer, M. Lein, and C. H. Keitel
Journal of Physics B-Atomic Molecular and Optical Physics 40, F113-F119 (2007)

1.150 Enhancement of vacuum polarization effects in a plasma

A. Di Piazza, K. Z. Hatsagortsyan, and C. H. Keitel
Physics of Plasma 14, 032102 (2007)

1.149 Refocussed relativistic recollisions

M. Verschl and C. H. Keitel
Europhysics Letters 77, 64004, 1-5 (2007)

1.148 Impact of a static magnetic field on high-order harmonic spectra

R. Fischer, C. H. Keitel, R. Jung, G. Pretzler, and O. Willi
Physical Review A 75, 033401 (2007)

1.147 Two-mode single-atom laser as a source of entangled light

M. Kiffner, M. S. Zubairy, J. Evers, and C. H. Keitel
Physical Review A 75, 033816 (2007)

1.146 Coherent control in a decoherence-free subspace of a collective multilevel system

M. Kiffner, J. Evers, and C. H. Keitel
Physical Review A 75, 032313 (2007)

1.145 Localization of atomic ensembles via superfluorescence

M. Macovei, J. Evers, C. H. Keitel, and M. S. Zubairy
Physical Review A 75, 033801 (2007)

1.144 Relativistic recollisions with two consecutive laser pulses

M. Verschl and C. H. Keitel
Journal of Physics B-Atomic Molecular and Optical Physics 40, F69-F76 (2007)

1.143 Relativistic classical and quantum dynamics in intense crossed laser beams of various polarizations

M. Verschl and C. H. Keitel
Physical Review Special Topics-Accelerators and Beams 10, 024001 (2007)

1.142 Strong-field spatial interference in a tailored electromagnetic bath

M. Macovei, J. Evers, G. X. Li, and C. H. Keitel
Physical Review Letters 98, 043602, 1-4 (2007)

1.141 Nonsequential double recombination in intense laser fields

P. Koval, F. Wilken, D. Bauer, and C. H. Keitel
Physical Review Letters 98, 043904 (2007)

1.140 Evaluation of laser-assisted bremsstrahlung with Dirac-Volkov propagators

E. Lötstedt, U. D. Jentschura, and C. H. Keitel
Physical Review Letters 98, 043002 (2007)

1.139 Enhanced recollision dynamics via the combination of antisymmetric wave functions and beyond-dipole effects

R. Fischer, M. Lein, and C. H. Keitel
Journal of Modern Optics 54, 1911-1926 (2007)

1.138 Laser-induced dynamic radiative corrections in the dressed-state and in the Floquet picture

G. Y. Kryuchkyan, U. D. Jentschura, J. Evers, and C. H. Keitel
Journal of Modern Optics 54, 1481-1495 (2007)

1.137 Relativistic ionization rescattering with tailored laser pulses

M. Klaiber, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 74, 051803, 1-4 (2006)

1.136 Photoionization broadening of the 1S-2S transition in a beam of atomic hydrogen

N. Kolachevsky, M. Haas, U. D. Jentschura, M. Herrmann, P. Fendel, M. Fischer, R. Holzwarth, T. Udem, C. H. Keitel, and T. W. Hänsch
Physical Review A 74, 052504, 1-9 (2006)

1.135 Muon pair creation from positronium in a circularly polarized laser field

C. Müller, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review D 74, 074017, 1-16 (2006)

1.134 Dynamic nuclear Stark shift in superintense laser fields

T. J. Bürvenich, J. Evers, and C. H. Keitel
Physical Review C 74, 044601, 1-9 (2006)

1.133 Enhanced Recollisions for Antisymmetric Molecular Orbitals in Intense Laser Fields

R. Fischer, M. Lein, and C. H. Keitel
Physical Review Letters 97, 143901, 1-4 (2006)

1.132 Exploring Relativistic Many-Body Recoil Effects in Highly Charged Ions

R. Soria Orts, Z. Harman, J. R. Crespo López-Urrutia, A. N. Artemyev, H. Bruhns, A. J. González Martínez, U. D. Jentschura, C. H. Keitel, A. Lapierre, V. Mironov, V. M. Shabaev, H. Tawara, I. I. Tupitsyn, J. Ullrich, and A. V. Volotka
Physical Review Letters 97, 103002, 1-4 (2006)

1.131 Microscopic laser-driven high-energy colliders

K. Z. Hatsagortsyan, C. Müller, and C. H. Keitel
Europhysics Letters 76, 29-35 (2006)

1.130 Light Diffraction by a Strong Standing Electromagnetic Wave

A. Di Piazza, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 97, 083603, 1-4 (2006)

1.129 Controlling multiparticle correlations with a strong laser field

M. Dal Col, M. Macovei, and C. H. Keitel
Optics Communications 264, 407-412 (2006)

1.128 Collective coherent population trapping in a thermal field

M. Macovei, Z. Ficek, and C. H. Keitel
Physical Review A 73, 063821 (2006)

1.127 Interference in the resonance fluorescence of two incoherently coupled transitions

M. Kiffner, J. Evers, and C. H. Keitel
Physical Review A 73, 063814 (2006)

1.126 Polarization-operator approach to electron-positron pair production in combined laser and Coulomb fields

A. I. Milstein, C. Müller, K. Z. Hatsagortsyan, U. D. Jentschura, and C. H. Keitel
Physical Review A 73, 062106 (2006)

1.125 Gauge-invariant relativistic strong-field approximation

M. Klaiber, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 73, 053411 (2006)

1.124 Benchmarking high-field few-electron correlation and QED contributions in Hg75+ to Hg78+ ions: II. Theory

Z. Harman, I. I. Tupitsyn, A. N. Artemyev, U. D. Jentschura, C. H. Keitel, A. J. González Martínez, J. R. Crespo López-Urrutia, H. Tawara, and J. Ullrich
Physical Review A 73, 052711, 1-13 (2006)

1.123 Benchmarking high-field few-electron correlation and QED contributions in Hg75+ to Hg78+ ions: I. Experiment

A. J. González-Martínez, J. R. Crespo López-Urrutia, J. Braun, G. Brenner, H. Bruhns, A. Lapierre, V. Mironov, R. Soria Orts, H. Tawara, M. Trinczek, J. Ullrich, A. N. Artemyev, Z. Harman, U. D. Jentschura, C. H. Keitel, J. H. Scofield, and I. I. Tupitsyn
Physical Review A 73, 052710, 1-10 (2006)

1.122 Two-photon excitation dynamics in bound two-body Coulomb systems including ac Stark shift and ionization

M. Haas, U. D. Jentschura, C. H. Keitel, N. Kolachevsky, M. Herrmann, P. Fendel, M. Fischer, T. Udem, R. Holzwarth, T. W. Hänsch, M. O. Scully, and G. S. Agarwal
Physical Review A 73, 052501 (2006)

1.121 Two-electron ionization and stabilization beyond the dipole approximation

A. Staudt and C. H. Keitel
Physical Review A 73, 043412 (2006)

1.120 Nuclear Quantum Optics with X-Ray Laser Pulses

T. J. Bürvenich, J. Evers, and C. H. Keitel
Physical Review Letters 96, 142501 (2006)

1.119 Quantum Interference Enforced by Time-Energy Complementarity

M. Kiffner, J. Evers, and C. H. Keitel
Physical Review Letters 96, 100403, 1-4 (2006)

1.118 Relativistic high-power laser–matter interactions

Y. I. Salamin, S. X. Hu, K. Z. Hatsagortsyan, and C. H. Keitel
Physics Reports 427, 41-155 (2006)

1.117 Geometry-dependent dynamics of two Λ-type atoms via vacuum-induced coherences

J. Evers, M. Kiffner, M. Macovei, and C. H. Keitel
Physical Review A 73, 023804 (2006)

1.116 Ionization suppression of excited atomic states beyond the stabilization regime

A. Staudt, C. H. Keitel, and J. S. Briggs
Journal of Physics B 39, 633-639 (2006)

1.115 Comparison of classical and second quantized description of the dynamic Stark shift

M. Haas, U. D. Jentschura, and C. H. Keitel
American Journal of Physics 74, 77-81 (2006)

1.114 Quantum correlations of an atomic ensemble via an incoherent bath

M. Macovei, J. Evers, and C. H. Keitel
Physical Review A 72, 063809, 1-5 (2005)

1.113 Laser-dressed vacuum polarization in a Coulomb field

A. I. Milstein, I. S. Terekhov, U. D. Jentschura, and C. H. Keitel
Physical Review A 72, 052104, 1-12 (2005)

1.112 Relativistic electron correlation, quantum electrodynamics and the lifetime of the 1s22s22p 23/2 level in boronlike argon

A. Lapierre, U. D. Jentschura, J. R. Crespo López-Urrutia, J. Braun, G. Brenner, H. Bruhns, D. Fischer, A. J. González Martínez, Z. Harman, W. R. Johnson, C. H. Keitel, V. Mironov, C. J. Osborne, G. Sikler, R. Soria Orts, H. Tawara, I. I. Tupitsyn, J. Ullrich, and A. Volotka
Physical Review Letters 95, 183001, 1-4 (2005)

1.111 Rapid refractive index enhancements via laser-mediated collectivity

M. Macovei and C. H. Keitel
Journal of Physics B-Atomic Molecular and Optical Physics 38, L315-L321 (2005)

1.110 Harmonic generation from laser-driven vacuum

A. Di Piazza, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review D 72, 085005, 1-23 (2005)

1.109 Free-electron quantum signatures in intense laser fields

M. Mahmoudi, Y. I. Salamin, and C. H. Keitel
Physical Review A 72, 033402, 1-7 (2005)

1.108 Thin crystal layers in superstrong laser fields: Dynamics and coherent x-ray generation

K. Z. Hatsagortsyan and C. H. Keitel
Physical Review A 72, 023812, 1-15 (2005)

1.107 Low-frequency-field-induced spontaneous-emission interference in a two-level atom placed in an anisotropic photonic crystal

G. Li, J. Evers, and C. H. Keitel
Journal of Physics B-Atomic Molecular and Optical Physics 38, 1435-1451 (2005)

1.106 Above-threshold ionization beyond the dipole approximation

M. Klaiber, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review A 71, 033408, 1-7 (2005)

1.105 Coherent manipulation of collective three-level systems

M. Macovei, J. Evers, and C. H. Keitel
Physical Review A 71, 033802, 1-16 (2005)

1.104 Multiphoton quantum interference on a dipole-forbidden transition

U. Akram, J. Evers, and C. H. Keitel
Journal of Physics B 38, L69-L77 (2005)

1.103 Radiation spectra of laser-driven quantum relativistic electrons

G. R. Mocken and C. H. Keitel
Computer Physics Communications 166, 171-190 (2005)

1.102 Relativistic and radiative energy shifts for Rydberg states

U. D. Jentschura, E. Le Bigot, J. Evers, P. J. Mohr, and C. H. Keitel
Journal of Physics B 38, S97-S105 (2005)

1.101 Analytical Approach to Wave Packet Dynamics of Laser-Driven Particles beyond the Dipole Approximation

M. Verschl and C. H. Keitel
Laser Physics 15, 529-535 (2005)

1.100 Radiative Corrections to Multi-Level Mollow-Type Spectra

U. D. Jentschura, J. Evers, and C. H. Keitel
Laser Physics 15, 37-45 (2005)

1.99 Relativistic and radiative corrections to the Mollow spectrum

J. Evers, U. D. Jentschura, and C. H. Keitel
Physical Review A 70, 062111, 1-20 (2004)

1.98 Magnetic and thermal influences on collective resonance fluorescence

M. Macovei, J. Evers, and C. H. Keitel
Europhysics Letters 68, 391-397 (2004)

1.97 Double-EIT ground-state laser cooling without blue-sideband heating

J. Evers and C. H. Keitel
Europhysics Letters 68, 370-376 (2004)

1.96 Bound atomic dynamics in the MeV regime

G. R. Mocken and C. H. Keitel
Journal of Physics B-Atomic Molecular and Optical Physics 37, L275-L283 (2004)

1.95 Spontaneous-emission suppression via multiphoton quantum interference

J. Evers and C. H. Keitel
Journal of Physics B-Atomic Molecular and Optical Physics 37, 2771-2796 (2004)

1.94 Positronium in Intense Laser Fields

B. Henrich, K. Z. Hatsagortsyan, and C. H. Keitel
Physical Review Letters 93, 013601 (2004)

1.93 New Limits on the Drift of Fundamental Constants from Laboratory Measurements

M. Fischer, N. Kolachevsky, M. Zimmermann, R. Holzwarth, T. Udem, T. W. Hänsch, M. Abgrall, J. Grünert, I. Maksimovic, S. Bize, H. Marion, F. Pereira Dos Santos, P. Lemonde, G. Santarelli, P. Laurent, A. Clairon, C. Salomon, M. Haas, U. D. Jentschura, and C. H. Keitel
Physical Review Letters 92, 230802 (2004)

1.92 Quantum dynamics of relativistic electrons

G. Mocken and C. H. Keitel
Journal of Computational Physics 199, 558-588 (2004)

1.91 Simulation of atomic quantum dynamics in combined intense laser and weak electric fields

R. Fischer, A. Staudt, and C. H. Keitel
Computer Physics Communications 157, 139-146 (2004)

1.90 Radiative corrections in laser-dressed atoms: formalism and applications

U. D. Jentschura and C. H. Keitel
Annals of Physics 310, 1-55 (2004)

1.89 Lamb Shift of Laser-Dressed Atomic States

U. D. Jentschura, J. Evers, M. Haas, and C. H. Keitel
Physical Review Letters 91, 253601 (2003)

1.88 Phase Control of Collective Quantum Dynamics

M. Macovei, J. Evers, and C. H. Keitel
Physical Review Letters 91, 233601 (2003)

1.87 Quantum Signatures in Laser-Driven Relativistic Multiple Scattering

G. R. Mocken and C. H. Keitel
Physical Review Letters 91, 173202 (2003)

1.86 Laser Control of Collective Spontaneous Emission

M. Macovei and C. H. Keitel
Physical Review Letters 91, 123601 (2003)

1.85 Stabilization of helium in intense high-frequency laser pulses beyond the dipole approximation

A. Staudt and C. H. Keitel
Journal of Physics B: Atomic, Molecular and Optical Physics 36, L203-L209 (2003)

1.84 Quasi-simultaneous double ionization of helium in super-intense high-frequency laser pulses

A. Staudt, J. Prager, and C. H. Keitel
Europhysics letters 62, 691-697 (2003)

1.83 Relativistische Quantendynamik in intensiven Laserfeldern

C. H. Keitel
Physik Journal 2, 61-65 (2003)

1.82 Low group velocity of light without an extra driving laser field

M. Haas and C. H. Keitel
Optics Communications 216, 385-389 (2003)

1.81 Relativistic electron dynamics in intense crossed laser beams: Acceleration and Compton harmonics

Y. I. Salamin, G. R. Mocken, and C. H. Keitel
Physical review E 67, 016501 (2003)

1.80 Optimum Conditions for Electron Acceleration Using Tightly Focused Laser Beams

Y. I. Salamin and C. H. Keitel
Laser Physics 13, 407-413 (2003)

1.79 Modifying spontaneous emission via interferences from incoherent pump fields

D. Bullock, J. Evers, and C. H. Keitel
Physics Letters. A 307, 3-12 (2002)

1.78 Electron scattering and acceleration by a tightly focused laser beam

Y. I. Salamin, G. R. Mocken, and C. H. Keitel
Physical Review Special Topics-Accelerators and Beams 5, 101301 (2002)

1.77 Spontaneous-Emission Suppression on Arbitrary Atomic Transitions

J. Evers and C. H. Keitel
Physical Review Letters 89, 163601 (2002)

1.76 Inhibiting decoherence via ancilla processes

G. Zeng and C. H. Keitel
Physical Review. A 66, 022306 (2002)

1.75 A problematic set of two-loop self-energy corrections

U. D. Jentschura, J. Evers, K. Pachucki, and C. H. Keitel
New Journal of Physics 4, 49, 1-11 (2002)

1.74 Dark state suppression and narrow fluorescent feature in a laser-driven Λ atom

J. Evers, D. Bullock, and C. H. Keitel
Optics Communications 209, 173-179 (2002)

1.73 Resonant multiphoton X-ray optics with highly charged ions

M. Casu and C. H. Keitel
Europhysics Letters 58, 496-502 (2002)

1.72 Phase-matched high-harmonic generation from laser-driven crystals

K. Z. Hatsagortsyan and C. H. Keitel
Journal of Physics B: Atomic, Molecular and Optical Physics 35, L175-L180 (2002)

1.71 Spin and radiation in intense laser fields

M. Walser, D. J. Urbach, K. Z. Hatsagortsyan, S. Hu, and C. H. Keitel
Physical Review. A 65, 043410 (2002)

1.70 Arbitrated quantum-signature scheme

G. Zeng and C. H. Keitel
Physical Review. A 64, 042312 (2002)

1.69 Laser-induced nonsequential double ionization approaching the relativistic regime

J. Prager and C. H. Keitel
Journal of Physics B: Atomic, Molecular and Optical Physics 35, L167-L174 (2002)

1.68 Electron Acceleration by a Tightly Focused Laser Beam

Y. I. Salamin and C. H. Keitel
Physical Review Letters 88, 095005 (2002)

1.67 Narrow spectral feature in resonance fluorescence with a single monochromatic laser field

J. Evers and C. H. Keitel
Physical Review. A 65, 033813 (2002)

1.66 Coherent x-ray pulse generation in the sub-Ångström regime

C. H. Keitel and S. X. Hu
Applied Physics Letters 80, 541-543 (2002)

1.65 Relativistic classical Monte Carlo simulations of stabilization of hydrogenlike ions in intense laser pulses

L. N. Gaier and C. H. Keitel
Physical Review. A 65, 023406 (2002)

1.64 Two-Loop QED Bound-State Calculations and Squared Decay Rates

U. D. Jentschura, C. H. Keitel, and K. Pachucki
Canadian Journal of Physics 80, 1213-1223 (2002)

1.63 Nuclear correlation in ionization and harmonic generation of H2+ in short intense laser pulses

W. Qu, Z. Chen, Z. Xu, and C. H. Keitel
Physical Review. A 65, 013402 (2001)

1.62 Relativistic quantum optics

C. H. Keitel
Contemporary Physics 42, 353-363 (2001)

1.61 Narrow high-frequency spectral features via laser-induced slow spin flips

M. W. Walser and C. H. Keitel
Optics Communications 199, 447-451 (2001)

1.60 High-order regime of harmonic generation with two active electrons

J. Prager, S. Hu, and C. H. Keitel
Physical Review. A 64, 045402 (2001)

1.59 Dynamics of multiply charged ions in intense laser fields

S. Hu and C. H. Keitel
Physical Review. A 63, 053402 (2001)

1.58 Electron acceleration in combined laser and uniform electric fields

C. H. Keitel, Y. I. Salamin, and F. H. M. Faisal
Journal of Physics A: Mathematical and General 34, 2819-2837 (2001)

1.57 X-Ray Amplification by Laser Controlled Coherent Bremsstrahlung

K. Z. Hatsagortsyan and C. H. Keitel
Physical Review Letters 86, 2277-2280 (2001)

1.56 Geometric and Algebraic Approach to Classical Dynamics of a Particle with Spin

M. W. Walser and C. H. Keitel
Letters in Mathematical Physics 55, 63-70 (2001)

1.55 High Harmonic Generation Beyond the Electric Dipole Approximation

M. W. Walser, C. H. Keitel, A. Scrinzi, and T. Brabec
Physical Review Letters 85, 5082-5085 (2000)

1.54 Analysis of electron acceleration in a vacuum beat wave

Y. I. Salamin and C. H. Keitel
Journal of Physics B: Atomic, Molecular and Optical Physics 33, 5057-5076 (2000)

1.53 Ground State Laser Cooling Using Electromagnetically Induced Transparency

G. Morigi, J. Eschner, and C. H. Keitel
Physical Review Letters 85, 4458-4461 (2000)

1.52 Exact analysis of ultrahigh laser-induced acceleration of electrons by cyclotron autoresonance

Y. I. Salamin, F. H. M. Faisal, and C. H. Keitel
Physical Review. A 62, 053809 (2000)

1.51 Subcycle high electron acceleration by crossed laser beams

Y. I. Salamin and C. H. Keitel
Applied Physics Letters 77, 1082-1084 (2000)

1.50 Resonance fluorescence in intense laser fields

D. E. Browne and C. H. Keitel
Journal of Modern Optics 47, 1307-1337 (2000)

1.49 Coherent x-ray generation with laser driven ions

M. Casu, C. Szymanowski, S. Hu, and C. H. Keitel
Journal of Physics B: Atomic, Molecular and Optical Physics 33, L411-L417 (2000)

1.48 Amplification without inversion in tailored vacua

M. Erhard and C. H. Keitel
Optics Communications 179, 517-523 (2000)

1.47 Spin-induced force in intense laser-electron interaction

M. W. Walser and C. H. Keitel
Journal of Physics B: Atomic, Molecular and Optical Physics 33, L221-L225 (2000)

1.46 Magnetically induced ionization and rescatterings in intense laser fields

D. J. Urbach and C. H. Keitel
Physical Review. A 61, 043409 (2000)

1.45 Spin Signatures in Intense Laser-Ion Interaction

S. Hu and C. H. Keitel
Physical Review Letters 83, 4709-4712 (1999)

1.44 Influence of spin-laser interaction on relativistic harmonic generation

M. W. Walser, C. Szymanowski, and C. H. Keitel
Europhysics Letter 48, 533-539 (1999)

1.43 Narrowing Spontaneous Emission without Intensity Reduction

C. H. Keitel
Physical Review Letters 83, 1307-1310 (1999)

1.42 Hollowing out single ions with high-power lasers

S. Hu and C. H. Keitel
Europhysics Letters 47, 318-323 (1999)

1.41 Total Fluorescence Inhibition via Incoherent Dressed Population Transfer

C. H. Keitel, S. Y. Zhu, and P. L. Knight
Laser Physics 9, 826-830 (1999)

1.40 Influence of Zitterbewegung on Relativistic Harmonic Generation

C. Szymanowski, C. H. Keitel, and A. Maquet
Laser Physics 9, 133-137 (1999)

1.39 Fluorescence control through multiple interference mechanisms

E. Paspalakis, C. H. Keitel, and P. L. Knight
Physical Review. A 58, 4868-4877 (1998)

1.38 Radiative reaction in ultra-intense laser - atom interaction

C. H. Keitel, C. Szymanowski, P. L. Knight, and A. Maquet
Journal of Physics B: Atomic, Molecular and Optical Physics 31, L75-L83 (1998)

1.37 Exponential gain in resonant four-wave mixing via dressed inversions

C. H. Keitel
Physical Review. A 57, 1412-1416 (1998)

1.36 Mott scattering in strong laser fields

C. Szymanowski, V. Véniard, R. Taieb, A. Maquet, and C. H. Keitel
Physical Review. A 56, 3846-3859 (1997)

1.35 Intense laser - atom dynamics with the two-dimensional Dirac equation

C. H. Keitel, U. W. Rathe, M. Protopapas, and P. L. Knight
Journal of Physics B: Atomic, Molecular and Optical Physics 30, L531-L539 (1997)

1.34 Quantum interference effects in spontaneous atomic emission: Dependence of the resonance fluorescence spectrum on the phase of the driving field

M. A. Martinez, P. R. Herczfeld, C. Samuels, L. M. Narducci, and C. H. Keitel
Physical Review. A 55, 4483-4491 (1997)

1.33 Strong intracavity and output laser noise reduction via initial atomic coherence

C. Saavedra, J. C. Retamal, and C. H. Keitel
Physical Review. A 55, 3802-3812 (1997)

1.32 Atomic physics with super-high intensity lasers

M. Protopapas, C. H. Keitel, and P. L. Knight
Reports on Progress in Physics 60, 389-486 (1997)

1.31 The dressed state picture in quantum coherence and interference

C. H. Keitel, H. M. Doss, M. Fleischhauer, L. M. Narducci, M. O. Scully, and S. Y. Zhu
Zeitschrift für Naturforschung Section A : Journal of Physical Sciences 52, 114-116 (1997)

1.30 Phase of harmonics from strongly driven two-level atoms

F. I. Gauthey, C. H. Keitel, P. L. Knight, and A. Maquet
Physical Review. A 55, 615-621 (1997)

1.29 Ultra-energetic electron ejection in relativistic atom - laser field interaction

C. H. Keitel
Journal of Physics B: Atomic, Molecular and Optical Physics 29, L873-L880 (1996)

1.28 Relativistic mass shift effects in adiabatic intense laser field stabilization of atoms

M. Protopapas, C. H. Keitel, and P. L. Knight
Journal of Physics B: Atomic, Molecular and Optical Physics 29, L591-L598 (1996)

1.27 Entropic measure of wave-packet spreading and ionization in laser-driven atoms

J. B. Watson, C. H. Keitel, P. L. Knight, and K. Burnett
Physical Review. A 54, 729-735 (1996)

1.26 Recollisions, bremsstrahlung, and attosecond pulses from intense laser fields

M. Protopapas, D. G. Lappas, C. H. Keitel, and P. L. Knight
Physical Review. A 53, R2933-R2936 (1996)

1.25 High harmonic generation in a static magnetic field

J. Connerade and C. H. Keitel
Physical Review. A 53, 2748-2751 (1996)

1.24 Role of electromagnetically induced transparency in resonant four-wave-mixing schemes

J. C. Petch, C. H. Keitel, P. L. Knight, and J. P. Marangos
Physical Review. A 53, 543-561 (1996)

1.23 Vacuum modified resonance fluorescence in intense laser fields

C. H. Keitel
Journal of Modern Optics 43, 1555-1562 (1996)

1.22 Quantum signatures in the stabilization dynamics

J. B. Watson, C. H. Keitel, P. L. Knight, and K. Burnett
Physical Review. A 52, 4023-4028 (1995)

1.21 Role of initial coherence in the generation of harmonics and sidebands from a strongly driven two-level atom

F. I. Gauthey, C. H. Keitel, P. L. Knight, and A. Maquet
Physical Review. A 52, 525-540 (1995)

1.20 Resonance fluorescence in a tailored vacuum

C. H. Keitel, P. L. Knight, L. M. Narducci, and M. O. Scully
Optics Communications 118, 143-153 (1995)

1.19 Sampling entropies and operational phase-space measurement. II. Detection of quantum coherences

V. Buzek, C. H. Keitel, and P. L. Knight
Physical Review. A 51, 2594-2601 (1995)

1.18 Sampling entropies and operational phase-space measurement. I. General formalism

V. Buzek, C. H. Keitel, and P. L. Knight
Physical Review. A 51, 2575-2593 (1995)

1.17 Monte Carlo classical simulations of ionization and harmonic generation in the relativistic domain

C. H. Keitel and P. L. Knight
Physical Review. A 51, 1420-1430 (1995)

1.16 Origin of the sub-natural line-narrowing effect in resonance fluorescence

C. H. Keitel, L. M. Narducci, and M. O. Scully
Applied Physics B: Lasers and Optics 60, 153-154 (1995)

1.15 Switching Between Rayleigh-like and Lorentzian Lineshapes of the Dispersion in Driven Two-level Atoms

C. Szymanowski, C. H. Keitel, B. J. Dalton, and P. L. Knight
Journal of Modern Optics 42, 985-1003 (1995)

1.14 Enhancing the index of refraction under convenient conditions

C. Szymanowski and C. H. Keitel
Journal of Physics B: Atomic, Molecular and Optical Physics 27, 5795-5812 (1994)

1.13 Relativistic High-Harmonic Generation

C. H. Keitel, P. L. King, and K. Burnett
Europhysics Letters 24, 539-544 (1993)

1.12 Two mechanisms for inversionless amplification in four-level atoms with Raman pumping

C. H. Keitel, O. A. Kocharovskaya, L. M. Narducci, M. O. Scully, S. Y. Zhu, and H. M. Doss
Physical Review. A 48, 3196-3202 (1993)

1.11 Lasing without inversion: More gain for less pain

C. H. Keitel and P. L. Knight
Opto & Laser Europe 7, 39-43 (1993)

1.10 Free-electron lasing without inversion by interference of momentum states

G. Kurizki, M. O. Scully, and C. H. Keitel
Physical Review Letters 70, 1433-1436 (1993)

1.9 Lasing without inversion: interference of radiatively broadened resonances in dressed atomic systems

M. Fleischhauer, C. H. Keitel, L. M. Narducci, M. O. Scully, S. Y. Zhu, and M. S. Zubairy
Optics Communications 94, 599-608 (1992)

1.8 Quantum theory of laser emission from driven three-level atoms

A. S. Manka, C. H. Keitel, S. Y. Zhu, M. Fleischhauer, L. M. Narducci, and M. O. Scully
Optics Communications 94, 174-182 (1992)

1.7 Resonantly enhanced refractive index without absorption via atomic coherence

M. Fleischhauer, C. H. Keitel, M. O. Scully, C. Su, B. T. Ulrich, and S. Y. Zhu
Physical Review. A 46, 1468-1487 (1992)

1.6 On the information entropy of squeezed states and the entropic uncertainty relation

K. Wódkiewicz and C. H. Keitel
Physics Letters. A 167, 151-160 (1992)

1.5 Triggered superradiance

C. H. Keitel, M. O. Scully, and G. Süßmann
Physical Review. A 45, 3242-3249 (1992)

1.4 Lasing without inversion in a simple model of a three-level laser with microwave coupling

H. Fearn, C. H. Keitel, M. O. Scully, and S. Y. Zhu
Optics Communications 87, 323-330 (1992)

1.3 Lasing without inversion and enhancement of the index of refraction via interference of incoherent pump processes

M. Fleischhauer, C. H. Keitel, M. O. Scully, and C. Su
Optics Communications 87, 109-114 (1992)

1.2 Physical origin of the gain in a four-level model of a Raman driven laser without inversion

L. M. Narducci, M. O. Scully, C. H. Keitel, S. Y. Zhu, and H. M. Doss
Optics Communications 86, 324-332 (1991)

1.1 A simple model of a laser without inversion

L. M. Narducci, H. M. Doss, P. Ru, M. O. Scully, S. Y. Zhu, and C. H. Keitel
Optics Communications 81, 379-384 (1991)