Dynamic phase transitions of a driven Ising chain in a dissipative cavity

TL;DR

This paper investigates the nonequilibrium quantum phase transition in a driven dissipative Ising chain within a cavity, revealing a super-radiant phase transition and its impact on the chain's magnetic phases.

Contribution

It introduces a detailed analysis of the interplay between super-radiance and magnetic phase transitions in a driven-dissipative quantum system.

Findings

Identification of a super-radiant phase transition driven by external light.

Demonstration of the transition between ferromagnetic and paramagnetic phases.

Analysis of stability and criticality in the nonequilibrium steady state.

Abstract

We study the nonequilibrium quantum phase transition of an Ising chain in a dissipative cavity driven by an external transverse light field. When driving and dissipation are in balance, the system can reach a nonequilibrium steady state which undergoes a super-radiant phase transition as the driving strength increases. Interestingly, the super-radiant field changes the effective bias of the Ising chain in return and drives its own transition between the ferromagnetic and paramagnetic phase. We study the rich physics in this system with sophisticated behavior, and investigate important issues in its dynamics such as the stability of the system and criticality of the phase transition.