Publications

Below you can find a list of all our publications related to our Special Research Program. Click on the links to find the full papers!

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, T. Schumm, K. Zhang, V. Lal, G. Zitzer, J. Tiedau, M.V. Okhapkin, E. Peik
Phys. Rev. Research 7, L022036 (2025)
Characterization of the thorium-229 defect structure in CaF₂ crystals
S. Takatori, M. Pimon, S. Pollitt, M. Bartokos, K. Beeks A. Grüneis, T. Hiraki, T. Honma, N. Hosseini, A. Leitner, T. Masuda, I. Morawetz, K. Nitta, K. Okai, T. Riebner, F. Schaden, T. Schumm, O. Sekizawa, T. Sikorsky, Y. Takahashi, L. Toscani De Col, R. Yamamoto, T. Yomogida, A. Yoshimi, K. Yoshimura
New Journal of Physics 27, 043024 (2025)
Temperature sensitivity of a ²²⁹Thorium solid-state nuclear clock
J.S. Higgins, T. Ooi, J.F. Doyle, C. Zhang, J. Ye, K. Beeks, T. Sikorsky, T. Schumm
Phys. Rev Lett. 134, 113801 (2025)
An Embedding Cluster Approach for Accurate Electronic Structure Calculations of ²²⁹Th:CaF₂K. Nalikowski, V. Veryazov, K. Beeks, T. Schumm, M. Krosnicki
Phys. Rev. B 111, 115103 (2025)

Photoexcitation of the ²²⁹Th nuclear clock transition using twisted light
T. Kirschbaum, T. Schumm, A. Pálffy
Phys. Rev. C 110, 064326 (2024)
Frequency ratio of the ^229mTh nuclear isomeric transition and the ⁸⁷Sr atomic clock
C. Zhang, T. Ooi, J.S. Higgins, J.F. Doyle, L. von der Wense, K. Beeks, A. Leitner, G.A. Kazakov, P. Li, P.G. Thirolf, T. Schumm, J. Ye
Nature 633, 63–70 (2024)
Controlling ²²⁹Th isomeric state population in a VUV transparent crystal
T. Hiraki, K. Okai, M. Bartokos, K. Beeks, H. Fujimoto, Y. Fukunaga, H. Haba, Y. Kasamatsu, S. Kitao, A. Leitner, T. Masuda, M. Guan, N. Nagasawa, R. Ogake, M. Pimon, M. Pressler, N. Sasao, F. Schaden, T. Schumm, M. Seto, Y. Shigekawa, K. Shimizu, T. Sikorsky, K. Tamasaku, S. Takatori, T. Watanabe, A. Yamaguchi, Y. Yoda, A. Yoshimi, and K. Yoshimura
Nature Communications 15, 5536 (2024)
Laser Excitation of the Th-229 Nucleus
J. Tiedau, M. V. Okhapkin, K. Zhang, J. Thielking, G. Zitzer, E. Peik, F. Schaden, T. Pronebner, I. Morawetz, L. Toscani De Col, F. Schneider, A. Leitner, M. Pressler, G. A. Kazakov, K. Beeks, T. Sikorsky, and T. Schumm
Physical Review Letters Vol. 132, Iss. 18 (2024)
Frequency-mode-stable regenerative amplification at terahertz burst rates
V. Stummer,T. Flöry, M. Schneller, E. Kaksis, M. Zeiler, A. Pugžlys, A. Baltuška
APL Photonics 9, 036116 (2024)