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arXiv · 2609.12066

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

Jivyanshu Priya·Pragna Das·Auditya Sharma
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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.

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Jivyanshu Priya, Pragna Das, Auditya Sharma. 2026-09-29. Dephasing-driven suppression of superradiance and metastable dynamics in the anisotropic open Rabi model. https://arxiv.org/abs/2609.12066

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