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Q: Fachverband Quantenoptik und Photonik

Q 7: Poster I

Q 7.29: Poster

Montag, 6. März 2023, 16:30–19:00, Empore Lichthof

Collective atom-cavity coupling and non-linear dynamics with atoms with multilevel ground states — •Elmer Suarez¹, Federico Carollo², Igor Lesanovsky^2,3, Beatriz Olmos^2,3, Philippe W. Courteille⁴, and Sebastian Slama¹ — ¹Center for Quantum Science and Physikalisches Institut, Eberhard-Karls Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany — ²Institut für Theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany — ³3School of Physics and Astronomy and Centre for the Mathematics and Theoretical Physics of Quantum Non-Equilibrium Systems, The University of Nottingham, Nottingham, NG7 2RD, United Kingdom — ⁴Instituto de Física de São Carlos, Centro de pesquisa em óptica é fotônica, Universidade de São Paulo, Brazil

We investigate experimentally and theoretically the collective coupling between atoms with multilevel ground state manifolds and an optical cavity mode. The ensuing dynamics can be conveniently described by means of an effective dynamical atom-cavity coupling strength that depends on the occupation of the individual states and their coupling strengths with the cavity mode. This leads to a dynamical backaction of the atomic populations on the atom-cavity coupling strength. Our results show that the multilevel structure of electronic ground states can significantly alter the relaxation behavior in atom-cavity settings as compared to ensembles of two-level atoms.