Max Planck-RIKEN-PTB Center for

Publications

2023

BASE-STEP: A transportable antiproton reservoir for fundamental interaction studies
C. Smorra, F. Abbass, D. Schweitzer, M. Bohman, J. D. Devine, Y. Dutheil, A. Hobl, B. Arndt, B. B. Bauer, J. A. Devlin, S. Erlewein, M. Fleck, J. I. Jäger, B. M. Latacz, P. Micke, M. Schiffelholz, G. Umbrazunas, M. Wiesinger, C. Will, E. Wursten, H. Yildiz, K. Blaum, Y. Matsuda, A. Mooser, C. Ospelkaus, W. Quint, A. Soter, J. Walz, Y. Yamazaki, S. Ulmer
Rev. Sci. Instrum. 94, 113201 (2023) 

Ultra-thin polymer foil cryogenic window for antiproton deceleration and storage
B. M. Latacz, B. P. Arndt, J. A. Devlin, S. R. Erlewein, M. Fleck, J. I. Jäger, P. Micke, G. Umbrazunas, E. Wursten, F. Abbass, D. Schweitzer, M. Wiesinger, C. Will, H. Yildiz, K. Blaum, Y. Matsuda, A. Mooser, C. Ospelkaus, C. Smorra, A. Sótér, W. Quint, J. Walz, Y. Yamazaki, S. Ulmer
Rev. Sci. Instrum. 94, 103310 (2023) 

Robust and scalable rf spectroscopy in first-order magnetic sensitive states at second-long coherence time
C.-H. Yeh, K. C. Grensemann, L. S. Dreissen, H. A. Fürst and T. E. Mehlstäubler
New J. Phys. 25, 093054 (2023) 

Evaluation of a ⁸⁸Sr⁺ Optical Clock with a Direct Measurement of the Blackbody Radiation Shift and Determination of the Clock Frequency
M. Steinel, H. Shao, M. Filzinger, B. Lipphardt, M. Brinkmann, A. Didier, T. E. Mehlstäubler, T. Lindvall, E. Peik, and N. Huntemann
Phys. Rev. Lett. 131, 083002 (2023) 

Excitation of Forbidden Electronic Transitions in Atoms by Hermite–Gaussian Modes
A. A. Peshkov, E. Jordan, M. Kromrey, K. K. Mehta, T. E. Mehlstäubler, A. Surzhykov
Ann. Phys. (Berlin) 535, 2300204 (2023) 

Vacuum-ultraviolet laser source for spectroscopy of trapped thorium ions
J. Thielking, K. Zhang, J. Tiedau, J. Zander, G. Zitzer, M. V. Okhapkin and E. Peik
New J. Phys. 25, 083026 (2023) 

Improved Limits on the Coupling of Ultralight Bosonic Dark Matter to Photons from Optical Atomic Clock Comparisons
M. Filzinger, S. Dörscher, R. Lange, J. Klose, M. Steinel, E. Benkler, E. Peik, C. Lisdat, and N. Huntemann
Phys. Rev. Lett. 130, 253001 (2023) 

BASE—high-precision comparisons of the fundamental properties of protons and antiprotons
B. M. Latacz, B. P. Arndt, B. B. Bauer, J. A. Devlin, S. R. Erlewein, M. Fleck, J. I. Jäger, M. Schiffelholz, G. Umbrazunas, E. J. Wursten, F. Abbass, P. Micke, D. Popper, M. Wiesinger, C. Will, H. Yildiz, K. Blaum, Y. Matsuda, A. Mooser, C. Ospelkaus, W. Quint, A. Soter, J. Walz, Y. Yamazaki, C. Smorra, and S. Ulmer
Eur. Phys. J. D 77, 94 (2023) 

Experimental determination of the E2−M1 polarizability of the strontium clock transition
S. Dörscher, J. Klose, S. Maratha Palli, and Ch. Lisdat
Phys. Rev. Research 5, L012013 (2023) 

2022

High-precision mass measurement of doubly magic ²⁰⁸Pb
K. Kromer, C. Lyu, M. Door, P. Filianin, Z. Harman, J. Herkenhoff, W. Huang, C. H. Keitel, D. Lange, Y. N. Novikov, C. Schweiger, S. Eliseev, K. Blaum
Eur. Phys. J. A 58, 202 (2022) 

Measurement of the bound-electron g-factor difference in coupled ions
T. Sailer, V. Debierre, Z. Harman, F. Heiße, C. König, J. Morgner, B. Tu, A. V. Volotka, C. H. Keitel, K. Blaum & S. Sturm
Nature 606, 479–483 (2022) 

Excitation of an Electric Octupole Transition by Twisted Light
R. Lange, N. Huntemann, A. A. Peshkov, A. Surzhykov, and E. Peik
Phys. Rev. Lett. 129, 253901 (2022) 

Improved bounds on Lorentz violation from composite pulse Ramsey spectroscopy in a trapped ion
L. S. Dreissen, C.-H. Yeh, H. A. Fürst, K. C. Grensemann & T. E. Mehlstäubler
Nat. Commun. 13, 7314 (2022) 

An optical atomic clock based on a highly charged ion
S. A. King, L. J. Spieß, P. Micke, A. Wilzewski, T. Leopold, E. Benkler, R. Lange, N. Huntemann, A. Surzhykov, V. A. Yerokhin, J. R. Crespo López-Urrutia & P. O. Schmidt
Nature 611, 43–47 (2022) 

A high-Q superconducting toroidal medium frequency detection system with a capacitively adjustable frequency range > 180 kHz
F. Völksen, J. A. Devlin, M. J. Borchert, S. R. Erlewein, M. Fleck, J. I. Jäger, B. M. Latacz, P. Micke, P. Nuschke, G. Umbrazunas, E. J. Wursten, F. Abbass, M. A. Bohman, D. Popper, M. Wiesinger, C. Will, K. Blaum, Y. Matsuda, A. Mooser, C. Ospelkaus, C. Smorra, A. Soter, W. Quint, J. Walz, Y. Yamazaki, and S. Ulmer
Rev. Sci. Instrum. 93, 093303 (2022) 

Ab initio quantum theory of mass defect and time dilation in trapped-ion optical clocks
V. J. Martínez-Lahuerta, S. Eilers, T. E. Mehlstäubler, P. O. Schmidt, and K. Hammerer
Phys. Rev. A 106, 032803 (2022) 

Direct measurement of the ³He⁺ magnetic moments
A. Schneider, B. Sikora, S. Dickopf, M. Müller, N. S. Oreshkina, A. Rischka, I. A. Valuev, S. Ulmer, J. Walz, Z. Harman, C. H. Keitel, A. Mooser & K. Blaum
Nature 606, 878–883 (2022) 

Sympathetic cooling schemes for separately trapped ions coupled via image currents
C. Will, M. Bohman, T. Driscoll, M. Wiesinger, F. Abbass, M. J. Borchert, J. A. Devlin, S. Erlewein, M. Fleck, B. Latacz, R. Moller, A. Mooser, D. Popper, E. Wursten, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, C. Smorra and S. Ulmer
New J. Phys. 24, 033021 (2022) 

Millicharged Dark Matter Detection with Ion Traps
D. Budker, P. W. Graham, H. Ramani, F. Schmidt-Kaler, C. Smorra, and S. Ulmer
PRX Quantum 3, 010330 (2022) 

A 16-parts-per-trillion measurement of the antiproton-to-proton charge–mass ratio
M. J. Borchert, J. A. Devlin, S. R. Erlewein, M. Fleck, J. A. Harrington, T. Higuchi, B. M. Latacz, F. Voelksen, E. J. Wursten, F. Abbass, M. A. Bohman, A. H. Mooser, D. Popper, M. Wiesinger, C. Will, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki, C. Smorra & S. Ulmer
Nature 601, 53–57 (2022) 

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2021

Algorithmic Ground-State Cooling of Weakly Coupled Oscillators Using Quantum Logic
S. A. King, L. J. Spieß, P. Micke, A. Wilzewski, T. Leopold, J. R. C. López-Urrutia, and P. O. Schmidt
Phys. Rev. X 11, 041049 (2021)  | arXiv:2102.12427 

Blackbody radiation shift in strontium lattice clocks revisited
Ch. Lisdat, S. Dörscher, I. Nosske, and U. Sterr
Phys. Rev. Res. 3, L042036 (2021) 

Lifetime of the ²F_7/2 Level in Yb⁺ for Spontaneous Emission of Electric Octupole Radiation
R. Lange, A. A. Peshkov, N. Huntemann, Chr. Tamm, A. Surzhykov, and E. Peik
Phys. Rev. Lett. 127, 213001 (2021) 

A digital feedback system for advanced ion manipulation techniques in Penning traps
J. Herkenhoff, M. Door, P. Filianin, W. Huang, K. Kromer, D. Lange, R. X. Schüssler, C. Schweiger, S. Eliseev, and K. Blaum
Rev. Sci. Instrum. 92, 103201 (2021) 

Sympathetic cooling of a trapped proton mediated by an LC circuit
M. Bohman, V. Grunhofer, C. Smorra, M. Wiesinger, C. Will, M. J. Borchert, J. A. Devlin, S. Erlewein, M. Fleck, S. Gavranovic, J. Harrington, B. Latacz, A. Mooser, D. Popper, E. Wursten, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, S. Ulmer & BASE Collaboration
Nature 596, 514–518 (2021) 

Direct Q-Value Determination of the β⁻ Decay of ¹⁸⁷Re
P. Filianin, C. Lyu, M. Door, K. Blaum, W. J. Huang, M. Haverkort, P. Indelicato, C. H. Keitel, K. Kromer, D. Lange, Y. N. Novikov, A. Rischka, R. X. Schüssler, Ch. Schweiger, S. Sturm, S. Ulmer, Z. Harman, and S. Eliseev
Phys. Rev. Lett. 127, 072502 (2021) 

Tank-Circuit Assisted Coupling Method for Sympathetic Laser Cooling
B. Tu, F. Hahne, I. Arapoglou, A. Egl, F. Heiße, M. Höcker, C. König, J. Morgner, T. Sailer, A. Weigel, R. Wolf, and S. Sturm
Adv. Quantum Technol. 4, 2100029 (2021) 

Sensitivity to new physics of isotope-shift studies using the coronal lines of highly charged calcium ions
N.-H. Rehbehn, M. K. Rosner, H. Bekker, J. C. Berengut, P. O. Schmidt, S. A. King, P. Micke, M. F. Gu, R. Müller, A. Surzhykov, and J. R. Crespo López-Urrutia
Phys. Rev. A 103, L040801 (2021) 

XUV frequency comb production with an astigmatism-compensated enhancement cavity
J. Nauta, J.-H. Oelmann, A. Borodin, A. Ackermann, P. Knauer, I. S. Muhammad, R. Pappenberger, T. Pfeifer, and J. R. Crespo López-Urrutia
Optics Express 29, 2624 (2021) 

Improved limits for violations of local position invariance from atomic clock comparisons
R. Lange, N. Huntemann, J. M. Rahm, C. Sanner, H. Shao, B. Lipphardt, Chr. Tamm, S. Weyers, E. Peik
Phys. Rev. Lett. 126, 011102 (2021) 

Constraints on the Coupling between Axionlike Dark Matter and Photons Using an Antiproton Superconducting Tuned Detection Circuit in a Cryogenic Penning Trap
J. A. Devlin, M. J. Borchert, S. Erlewein, M. Fleck, J. A. Harrington, B. Latacz, J. Warncke, E. Wursten, M. A. Bohman, A. H. Mooser, C. Smorra, M. Wiesinger, C. Will, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki, and S. Ulmer
Phys. Rev. Lett. 126, 041301 (2021) 

Perspectives on testing fundamental physics with highly charged ions in Penning traps
K. Blaum, S. Eliseev and S. Sturm
Quantum Sci. Technol. 6, 014002 (2021) 

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2020

Precision Measurements of the Fundamental Properties of the Proton and Antiproton
C. Smorra and A. Mooser
J. Phys.: Conf. Ser. 1412, 032001 (2020) 

Search for transient variations of the fine structure constant and dark matter using fiber-linked optical atomic clocks
B. M. Roberts, P. Delva, A. Al-Masoudi, A. Amy-Klein, C. Baerentsen, C. F. A. Baynham, E. Benkler, S. Bilicki, S. Bize, W. Bowden, J. Calvert, V. Cambier, E. Cantin, E. A. Curtis, S. Dörscher, M. Favier, F. Frank, P. Gill, R. M. Godun, G. Grosche, C. Guo, A. Hees, I. R. Hill, R. Hobson, N. Huntemann, J. Kronjäger, S. Koke, A. Kuhl, R. Lange, T. Legero, B. Lipphardt, C. Lisdat, J. Lodewyck, O. Lopez, H. S. Margolis, H. Alvarez-Martinez, F. Meynadier, F. Ozimek, E. Peik, P.-E. Pottie, N. Quintin, C. Sanner, L. De Sarlo, M. Schioppo, R. Schwarz, A. Silva, U. Sterr, Chr. Tamm, R. LeTargat, P. Tuckey, G. Vallet, T. Waterholter, D. Xu, P. Wolf
New. J. Phys. 22, 093010 (2020) 

Dynamical decoupling of laser phase noise in compound atomic clocks
S. Dörscher, A. Al-Masoudi, M. Bober, R. Schwarz, R. Hobson, U. Sterr & C. Lisdat
Commun. Phys. 3, 185 (2020) 

Coherent Excitation of the Highly Forbidden Electric Octupole Transition in ¹⁷²Yb⁺
H. A. Fürst, C.-H. Yeh, D. Kalincev, A. P. Kulosa, L. S. Dreissen, R. Lange, E. Benkler, N. Huntemann, E. Peik, and T. E. Mehlstäubler
Phys. Rev. Lett. 125, 163001 (2020) 

Coherent Suppression of Tensor Frequency Shifts through Magnetic Field Rotation
R. Lange, N. Huntemann, C. Sanner, H. Shao, B. Lipphardt, Chr. Tamm, and E. Peik
Phys. Rev. Lett. 125, 143201 (2020) 

Penning trap mass measurements of the deuteron and the HD⁺ molecular ion
S. Rau, F. Heiße, F. Köhler-Langes, S. Sasidharan, R. Haas, D. Renisch, C. E. Düllmann, W. Quint, S. Sturm & K. Blaum
Nature 585, 43–47 (2020) 

Long term measurement of the ⁸⁷Sr clock frequency at the limit of primary Cs clocks
R. Schwarz, S. Dörscher, A. Al-Masoudi, E. Benkler, T. Legero, U. Sterr, S. Weyers, J. Rahm, B. Lipphardt, and C. Lisdat
Phys. Rev. Research 2, 033242 (2020) 

Electronic Bridge Excitation in Highly Charged ²²⁹Th Ions
P. V. Bilous, H. Bekker, J. C. Berengut, B. Seiferle, L. von der Wense, P. G. Thirolf, T. Pfeifer, J. R. Crespo López-Urrutia, and A. Pálffy
Phys. Rev. Lett. 124, 192502 (2020) 

Detection of metastable electronic states by Penning trap mass spectrometry
R. X. Schüssler, H. Bekker, M. Braß, H. Cakir, J. R. Crespo López-Urrutia, M. Door, P. Filianin, Z. Harman, M. W. Haverkort, W. J. Huang, P. Indelicato, C. H. Keitel, C. M. König, K. Kromer, M. Müller, Y. N. Novikov, A. Rischka, C. Schweiger, S. Sturm, S. Ulmer, S. Eliseev & K. Blaum
Nature 581, 42–46 (2020) 

100 MHz frequency comb for low-intensity multi-photon studies: intra-cavity velocity-map imaging of xenon
J. Nauta, J.-H. Oelmann, A. Ackermann, P. Knauer, R. Pappenberger, A. Borodin, I. S. Muhammad, H. Ledwa, T. Pfeifer, and J. R. Crespo López-Urrutia
Opt. Lett. 45, 2156-2159 (2020) 

Mass-Difference Measurements on Heavy Nuclides with an eV/c² Accuracy in the PENTATRAP Spectrometer
A. Rischka, H. Cakir, M. Door, P. Filianin, Z. Harman, W. J. Huang, P. Indelicato, C. H. Keitel, C. M. König, K. Kromer, M. Müller, Y. N. Novikov, R. X. Schüssler, Ch. Schweiger, S. Eliseev, and K. Blaum
Phys. Rev. Lett. 124, 113001 (2020) 

Coherent laser spectroscopy of highly charged ions using quantum logic
P. Micke, T. Leopold, S. A. King, E. Benkler, L. J. Spieß, L. Schmöger, M. Schwarz, J. R. Crespo López-Urrutia and P. O. Schmidt
Nature 578, 60-65 (2020) 

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2019

Detection of the 5p – 4f orbital crossing and its optical clock transition in Pr⁹⁺
H. Bekker, A. Borschevsky, Z. Harman, C. H. Keitel, T. Pfeifer, P. O. Schmidt, J. R. Crespo López-Urrutia & J. C. Berengut
Nat. Commun. 10, 5651 (2019) 

Direct limits on the interaction of antiprotons with axion-like dark matter
C. Smorra, Y. V. Stadnik, P. E. Blessing, M. Bohman, M. J. Borchert, J. A. Devlin, S. Erlewein, J. A. Harrington, T. Higuchi, A. Mooser, G. Schneider, M. Wiesinger, E. Wursten, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki, D. Budker & S. Ulmer
Nature 575, 310-314 (2019) 

Superconducting Solenoid System with Adjustable Shielding Factor for Precision Measurements of the Properties of the Antiproton
J. A. Devlin, E. Wursten, J. A. Harrington, T. Higuchi, P. E. Blessing, M. J. Borchert, S. Erlewein, J. J. Hansen, J. Morgner, M. A. Bohman, A. H. Mooser, C. Smorra, M. Wiesinger, K. Blaum, Y. Matsuda, C. Ospelkaus, W. Quint, J. Walz, Y. Yamazaki, and S. Ulmer
Phys. Rev. Applied 12, 044012 (2019) 

Application of the Continuous Stern-Gerlach Effect for Laser Spectroscopy of the ⁴⁰Ar¹³⁺ Fine Structure in a Penning Trap
A. Egl, I. Arapoglou, M. Höcker, K. König, T. Ratajczyk, T. Sailer, B. Tu, A. Weigel, K. Blaum, W. Nörtershäuser, and S. Sturm
Phys. Rev. Lett. 123, 123001 (2019) 

A Novel Penning Trap Design for the High Precision Measurement of the ³He²⁺ Nuclear Magnetic Moment
A. Schneider, A. Mooser, A. Rischka, K. Blaum, S. Ulmer, J. Walz
Ann. Phys. (Berlin) 531, 1800485 (2019)