Dephasing-driven suppression of superradiance and metastable dynamics in the anisotropic open Rabi model

Abstract:Finite-component light-matter systems realize dissipative phase transitions in a single controllable atom-cavity setup, but how atomic dephasing - ubiquitous in real cavity- and circuit-QED devices - affects this criticality remains unknown. We study the anisotropic open Rabi model under cavity decay, spontaneous emission, and atomic dephasing together. We show that when spontaneous emission stabilizes a long-lived metastable superradiant phase, atomic dephasing actively competes with it - eroding its coherence and shortening the lifetime. This direct competition reveals that a dissipation channel's microscopic character, not its strength, controls its nonequilibrium criticality - a distinction directly tunable via independent spontaneous-emission and dephasing rates in circuit-QED and trapped-ion platforms.

Quantum Physics (quant-ph); Disordered Systems and Neural Networks (cond-mat.dis-nn); Quantum Gases (cond-mat.quant-gas)

arXiv:2609.12066 [quant-ph]

(or arXiv:2609.12066v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2609.12066 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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