Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 22: Nuclear and X-Ray Quantum Optics
Q 22.4: Vortrag
Dienstag, 3. März 2026, 12:00–12:15, P 11
Quantum dynamics of strongly-driven interacting Mössbauer nuclei — Miriam Gerharz1, Dominik Lentrodt1,2, and •Jörg Evers1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Freiburg im Breisgau
It is an old challenge whether it is possible to fully excited an ensemble of atomic nuclei using externally applied electromagnetic fields. Motivated by recent progress in x-ray source technology and in nuclear quantum optics, in this talk, I will revisit this problem from two sides. First, I will discuss the prospects of non-linear excitation of nuclei in thin-film x-ray cavities using strongly focused x-ray pulses. To this end, we developed a comprehensive theory framework to model focused x-ray pulses in x-ray cavities, and derived the excitation enhancement via the optimization of the nuclear environment [1]. Second, I will discuss the many-body coupled dissipative dynamics of the nuclear ensemble after the excitation, using a cumulant expansion which allowed us to derive a set of nonlinear equations which is capable of efficiently modeling large nuclear ensembles for arbitrary degrees of excitation [2]. We identified a non-linear time-evolution of the nuclear dipole phase as an experimentally accessible signature for higher excitation. Our analysis further predicts finite-size effects in the nuclear dynamics of small ensembles as an interesting as-yet unexplored observable. 1mm [1] D. Lentrodt, C. H. Keitel, and J. Evers, Phys. Rev. Lett. 135, 033801 (2025); Phys. Rev. A 112, 013711 (2025).
[2] M. Gerharz and J. Evers, arXiv:2510.00970 [quant-ph].
Keywords: Mössbauer nuclei; X-ray quantum optics; Nonlinear dynamics; Many-body dynamics; Cavity QED