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Quantum Physics
Title: Floquet analysis of a superradiant many-qutrit refrigerator
(Submitted on 27 Oct 2023 (v1), last revised 1 Apr 2024 (this version, v2))
Abstract: We investigate superradiant enhancements in the refrigeration performance of a set of $N$ three-level systems that are collectively coupled to a hot and a cold thermal reservoir and are additionally subject to collective periodic (circular) driving. Assuming the system-reservoir coupling to be weak, we explore the regime of stronger periodic driving strengths by comparing collective weak driving, Floquet-Lindblad, and Floquet-Redfield master equations. We identify regimes where the power injected by the periodic driving is used to pump heat from the cold to the hot reservoir and derive analytic sufficient conditions for them based on a cycle analysis of the Floquet-Lindblad master equation. In those regimes, we also argue for which parameters collective enhancements like a quadratic scaling of the cooling current with $N$ can be expected and support our arguments by numerical simulations.
Submission history
From: Gernot Schaller [view email][v1] Fri, 27 Oct 2023 13:15:58 GMT (4430kb,D)
[v2] Mon, 1 Apr 2024 11:55:04 GMT (2846kb,D)
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