Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 2: Quantum Gases (Bosons) I
Q 2.3: Talk
Monday, March 14, 2022, 14:45–15:00, Q-H10
Realization of a periodically driven open three-level Dicke model — •Phatthamon Kongkhambut1, Hans Keßler1, Jim Skulte1,2, Ludwig Mathey1,2, Jayson G. Cosme3, and Andreas Hemmerich1,2 — 1Institut für Laser-Physik, Universität Hamburg — 2The Hamburg Center for Ultrafast Imaging — 3National Institute of Physics, University of the Philippines
A periodically driven open three-level Dicke model is realized by resonantly shaking the pump* field in an atom-cavity system. As an unambiguous signature, we demonstrate the emergence of a dynamical phase, in which the atoms periodically localize between the antinodes of the pump lattice, associated with an oscillating net momentum along the pump axis. We observe this dynamical phase through the periodic switching of the relative phase between the pump and cavity fields at a small fraction of the driving frequency, suggesting that it exhibits a time crystalline character.
[1] P. Kongkhambut et al., arXiv:2108.11113 (2021). [2] J. Skulte et al., arXiv:2108.10877 (2021).