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Q: Fachverband Quantenoptik und Photonik

Q 35: Quantum Optics: Cavity and Waveguide QED II

Q 35.7: Vortrag

Mittwoch, 8. März 2023, 16:00–16:15, E001

Subradiant States in Cavity QED — •Tom Schmit¹, Alexander Baumgärtner², Simon Hertlein², Carlos Máximo², Davide Dreon², Tobias Donner², and Giovanna Morigi¹ — ¹Theoretische Physik, Universität des Saarlandes, 66123 Saarbrücken, Germany — ²Institute for Quantum Electronics, Eidgenössische Technische Hochschule Zürich, Otto-Stern-Weg 1, 8093 Zürich, Switzerland

We analyse theoretically self-organization of transversally pumped atoms that strongly couple to two cavity modes in the dispersive regime by means of the quantum master equation of Ref. [1]. We determine the stationary state and discuss the emerging phase diagram as a function of the experimental control parameters. We argue that, when the atomic detuning from the pump is on the blue, the atoms selforganize in patterns that exhibit the characteristics of subradiance. We then analyse the stability of these subradiant states by means of a quantum Euler equation, which we derive from the master equation in an appropriate limit. We compare our predictions with experimental measurements in the corresponding regime and find qualitative and quantitative agreement. ~\\ $[1]$ S. B. J{\"a}ger, T. Schmit, G. Morigi, M. J. Holland, and R. Betzholz, Phys. Rev. Lett. \textbf{129}, 063601 (2022).\\ $[2]$ P. Zupancic, D. Dreon, X. Li, A. Baumgärtner, A. Morals, W. Zheng, N. R. Cooper, T. Esslinger, and T. Donner, Phys. Rev. Lett. \textbf{123}, 233601 (2019).