Dynamical many-body phases of the parametrically driven, dissipative Dicke model

TL;DR

This paper explores how parametric modulation influences the phases of the dissipative Dicke model, revealing a new pulsed superradiant phase and mapping the complex phase diagram under driving and dissipation.

Contribution

It introduces the concept of a dynamical normal phase with pulsed superradiance in the driven, dissipative Dicke model, expanding understanding of out-of-equilibrium many-body phases.

Findings

Identification of a new pulsed superradiant phase

Mapping of the phase diagram with parametric modulation

Analysis of dissipation effects on phase boundaries

Abstract

The dissipative Dicke model exhibits a fascinating out-of-equilibrium many-body phase transition as a function of a coupling between a driven photonic cavity and numerous two-level atoms. We study the effect of a time-dependent parametric modulation of this coupling, and discover a rich phase diagram as a function of the modulation strength. We find that in addition to the established normal and super-radiant phases, a new phase with pulsed superradiance which we term dynamical normal phase appears when the system is parametrically driven. Employing different methods, we characterize the different phases and the transitions between them. Specific heed is paid to the role of dissipation in determining the phase boundaries. Our analysis paves the road for the experimental study of dynamically stabilized phases of interacting light and matter.