Selftrapping triggered by losses in cavity QED

TL;DR

This paper investigates how cavity losses induce a transition from localized to delocalized states in a coupled cavity QED network, revealing critical damping effects on quantum correlations and state dynamics.

Contribution

It demonstrates that cavity losses trigger a phase transition in the system, with a critical damping constant affecting quantum correlations and oscillation behaviors.

Findings

Losses induce a transition from localized to delocalized states.

A critical damping constant determines the nature of quantum correlations.

Oscillations and negativity peaks are suppressed above the critical damping.

Abstract

In a coupled cavity QED network model, we study the transition from a localized super fluid like state to a delocalized Mott insulator like state, triggered by losses. Without cavity losses, the transition never takes place. Further, if one measures the quantum correlations between the polaritons via the negativity, we find a critical cavity damping constant, above which the negativity displays a single peak in the same time region where the transition takes place. Additionally, we identify two regions in the parameter space, where below the critical damping, oscillations of the initial localized state are observed along with a multipeaked negativity, while above the critical value, the oscillations die out and the transition is witnessed by a neat single peaked negativity.