Signatures of a dissipative phase transition in photon correlation measurements

Understanding and characterizing phase transitions in driven-dissipative systems constitutes a new frontier for many-body physics 1–8 . A generic feature of dissipative phase transitions is a vanishing gap in the Liouvillian spectrum 9 , which leads to long-lived deviations from the steady state as the system is driven towards the transition. Here, we show that photon correlation measurements can be used to characterize the corresponding...