Max Planck-RIKEN-PTB Center for
Time, Constants and Fundamental SymmetriesPublications
2025
Towards trapping of hydrogen atoms for computable optical clock applications
O. Amit, D. Taray, V. Wirthl, V. Weis, M. W. Syed, A. Ozawa1, J. Weitenberg, S. G. Karshenboim, J. T. M. Walraven, L. Maisenbacher,
R. Pohl, Z. Burkley, F. Schmid, T. W. Hänsch, D. C. Yost, and Th. Udem
Phys. Rev. A 112, 033101 (2025)
Finding the Ultranarrow 3P2 -> 3P0 Electric Quadrupole Transition in Ni12+ Ion for an Optical Clock
C. Cheung, S. G. Porsev, D. Filin, M. S. Safronova, M. Wehrheim, L. J. Spieß, S. Chen, A. Wilzewski, J. R. C. López-Urrutia,
and P. O. Schmidt
Phys. Rev. Lett. 135, 093002 (2025)
Nuclear clock based on the Th v ion
V. V. Flambaum, V. A. Dzuba, and E. Peik
Phys. Rev. A 112, 023103 (2025)
Coherent spectroscopy with a single antiproton spin
B. M. Latacz, S. R. Erlewein, M. Fleck, J. I. Jäger, F. Abbass, B. P. Arndt, P. Geissler, T. Imamura, M. Leonhardt, P. Micke,
A. Mooser, D. Schweitzer, F. Voelksen, E. Wursten, H. Yildiz, K. Blaum, J. A. Devlin, Y. Matsuda, C. Ospelkaus, W. Quint, A. Soter,
J. Walz, Y. Yamazaki, C. Smorra & S. Ulmer
Nature 644, 64–68 (2025)
Excited-State Magnetic Properties of Carbon-like Ca14+
L. J. Spieß, S. Chen, A. Wilzewski, M. Wehrheim, J. Gilles, A. Surzhykov, E. Benkler, M. Filzinger, M. Steinel, N. Huntemann,
C. Cheung, S. G. Porsev, A. I. Bondarev, M. S. Safronova, J. R. Crespo López-Urrutia, and P. O. Schmidt
Phys. Rev. Lett. 135, 043002 (2025)
Coordinated international comparisons between optical clocks connected via fiber and satellite links
T. Lindvall, M. Pizzocaro, R. M. Godun, M. Abgrall, D. Akamatsu, A. Amy-Klein, E. Benkler, N. M. Bhatt, D. Calonico, E. Cantin,
E. Cantoni, G. Cerretto, C. Chardonnet, M. A. C. Marin, C. Clivati, S. Condio, E. A. Curtis, H. Denker, S. Donadello, S. Dörscher,
C. Feng, M. Filzinger, T. Fordell, I. Goti, K. Hanhijärvi, H. N. Hausser, I. R. Hill, K. Hosaka, N. Huntemann, M. Y. H. Johnson,
J. Keller, J. Klose, T. Kobayashi, S. Koke, A. Kuhl, R. Le Targat, T. Legero, F. Levi, B. Lipphardt, C. Lisdat, H. Liu,
J. Lodewyck, O. Lopez, M. Mazouth-Laurol, T. E. Mehlstäubler, A. Mura, A. Nishiyama, T. Nordmann, A. O. Parsons, G. Petit,
B. Pointard, P. E. Pottie, M. Risaro, B. I. Robertson, M. Schioppo, H. Shang, K. Stahl, M. Steinel, U. Sterr, A. Tofful,
M. Tønnes, D. Tran, J. Tunesi, A. E. Wallin, H. S. Margolis
Optica 12, 843-852 (2025)
Nonlinear Calcium King Plot Constrains New Bosons and Nuclear Properties
A. Wilzewski, L. J. Spieß, M. Wehrheim, S. Chen, S. A. King, P. Micke, M. Filzinger, M. R. Steinel, N. Huntemann, E. Benkler, and P. O. Schmidt
L. I. Huber, J. Flannery, R. Matt, M. Stadler, R. Oswald, F. Schmid, D. Kienzler, J. Home, and D. P. L. Aude Craik
M. Door, S. Eliseev, P. Filianin, J. Herkenhoff, K. Kromer, and K. Blaum
V. A. Yerokhin, I. A. Valuev, and N. S. Oreshkina
C. Lyu, S. Banerjee, C. H. Keitel, and Z. Harman
J. C. Berengut
A. Viatkina, J. Gilles, and A. Surzhykov
M. K. Rosner and J. R. Crespo López-Urrutia
J. Richter, A. Mariotti, and E. Fuchs
Phys. Rev. Lett. 134, 233002 (2025)
Testing interelectronic interaction in lithium-like tin
J. Morgner, V. A. Yerokhin, C. M. König, F. Heiss, B. Tu, T. Sailer, B. Sikora, Z. Harman, J. R. Crespo López-Urrutia,
C. H. Keitel, S. Sturm, and K. Blaum
Science 388 (6750), 945-949 (2025)
Laser spectroscopy on the hyperfine structure and isotope shift of sympathetically cooled
229Th3+ ions
G. Zitzer, J. Tiedau, Ch. E. Düllmann, M. V. Okhapkin, and E. Peik
Phys. Rev. A 111, L050802 (2025)
Laser-induced quenching of the Th-229 nuclear clock isomer in calcium fluoride
F. Schaden, T. Riebner, I. Morawetz, L. Toscani De Col, G. A. Kazakov, K. Beeks, T. Sikorsky, and T. Schumm
K. Zhang, V. Lal, G. Zitzer, J. Tiedau, M. V. Okhapkin, and E. Peik
Phys. Rev. Research 7, L022036 (2025)
Searching for Dark Matter with the 229Th Nuclear Lineshape from Laser Spectroscopy
E. Fuchs, F. Kirk, E. Madge, C. Paranjape, E. Peik, G. Perez, W. Ratzinger, and J. Tiedau
Phys. Rev. X 15, 021055 (2025)
Proton transport from the antimatter factory of CERN
M. Leonhardt, D. Schweitzer, F. Abbass, K. K. Anjum, B. Arndt, S. Erlewein, S. Endoh, P. Geissler, T. Imamura, J. I. Jäger,
B. M. Latacz, P. Micke, F. Voelksen, H. Yildiz, K. Blaum, J. A. Devlin, Y. Matsuda, C. Ospelkaus, W. Quint, A. Soter, J. Walz,
Y. Yamazaki, S. Ulmer & C. Smorra
Nature 641, 871–875 (2025)
Nondestructive Control of the Rovibrational Ground State of a Single Molecular Hydrogen Ion in a Penning Trap
C. M. König, F. Heiße, J. Morgner, T. Sailer, B. Tu, D. Bakalov, K. Blaum, S. Schiller, and S. Sturm
Phys. Rev. Lett. 134, 163001 (2025)
Indium tin oxide combined with anti-reflective coatings with high transmittance for wavelengths <400 nm
E. Jansson, V. Scheuer, E. Jordan, K. Kostourou, and T. E. Mehlstäubler
Appl. Opt. 64, 1715-1722 (2025)
g Factor of Boronlike Tin
J. Morgner, B. Tu, M. Moretti, C. M. König, F. Heiße, T. Sailer, V. A. Yerokhin, B. Sikora, N. S. Oreshkina, Z. Harman, C. H. Keitel, S. Sturm, and K. Blaum
Phys. Rev. Lett. 134, 123201 (2025)
Probing New Bosons and Nuclear Structure with Ytterbium Isotope Shifts
M. Door, C.-H. Yeh, M. Heinz, F. Kirk, C. Lyu, T. Miyagi, J. C. Berengut, J. Bieroń, K. Blaum, L. S. Dreissen, S. Eliseev,
P. Filianin, M. Filzinger, E. Fuchs, H. A. Fürst, G. Gaigalas, Z. Harman, J. Herkenhoff, N. Huntemann, C. H. Keitel, K. Kromer,
D. Lange, A. Rischka, C. Schweiger, A. Schwenk, N. Shimizu, and T. E. Mehlstäubler
Phys. Rev. Lett. 134, 063002 (2025)
115In+ - 172Yb+ Coulomb Crystal Clock with 2.5 × 10−18 Systematic Uncertainty
H. N. Hausser, J. Keller, T. Nordmann, N. M. Bhatt, J. Kiethe, H. Liu, I. M. Richter, M. von Boehn, J. Rahm, S. Weyers,
E. Benkler, B. Lipphardt, S. Dörscher, K. Stahl, J. Klose, C. Lisdat, M. Filzinger, N. Huntemann, E. Peik, and T. E. Mehlstäubler
Phys. Rev. Lett. 134, 023201 (2025)
Ultra-stable transportable ultraviolet clock laser using cancellation between photo-thermal and photo-birefringence noise
B. Kraus, S. Herbers, C. Nauk, U. Sterr, C. Lisdat, and P. O. Schmidt
Opt. Lett. 50, 658–661 (2025)





