Superradiant Switching, Quantum Hysteresis, and Oscillations in a Generalized Dicke Model

• URL: http://arxiv.org/abs/2007.13271v1
• Date: Mon, 27 Jul 2020 02:11:53 GMT
• Title: Superradiant Switching, Quantum Hysteresis, and Oscillations in a Generalized Dicke Model
• Authors: Kevin Stitely, Stuart J Masson, Andrus Giraldo, Bernd Krauskopf, and Scott Parkins
• Abstract summary: A first-order phase transition to coexisting normal and superradiant phases is observed, corresponding with the emergence of switching dynamics. We show that this phase coexistence gives rise to a loop also for the quantum mechanical system.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We demonstrate quantum signatures of deterministic nonlinear dynamics in the transition to superradiance of a generalized open Dicke model with different coupling strengths for the co- and counter-rotating light-matter interaction terms. A first-order phase transition to coexisting normal and superradiant phases is observed, corresponding with the emergence of switching dynamics between these two phases, driven by quantum fluctuations. We show that this phase coexistence gives rise to a hysteresis loop also for the quantum mechanical system. Additionally, a transition to a superradiant oscillatory phase can be observed clearly in quantum simulations.

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