Phase Transition in the periodically pulsed Dicke Model

TL;DR

This paper investigates how periodic pulsed and kicked driving influence the non-equilibrium phase transition in the Dicke Model, revealing new phases and enhanced control over quantum criticality through pulse parameters.

Contribution

It introduces a Floquet theory-based analysis of pulsed driving effects on the Dicke Model, highlighting the emergence of novel phases and improved control over dynamical quantum criticality.

Findings

New non-trivial phases emerge under pulsed driving.

Greater control over quantum criticality via pulse parameters.

Higher metastable state trapping probability with fewer pulses.

Abstract

We study the effect of pulsed driving and kicked driving of the interaction term on the non-equilibrium phase transition in the Dicke Model. Within the framework of Floquet theory, we observe the emergence of new non-trivial phases on impingement by such periodic pulses. Notably, our study reveals that a greater control over the dynamical quantum criticality is possible through the variation of multiple parameters related to the pulse, as opposed to a single parameter control in a monochromatic drive. Furthermore, the probability of the system remaining trapped in a metastable state during the observed first order transition from the super-radiant to normal phase is found to be higher for small number of kicks (or pulses) in comparison to the sinusoidal perturbation.