Dissipative phase transitions in optomechanical systems

TL;DR

This paper demonstrates that optomechanical systems can exhibit various dissipative phase transitions, including critical points, in the regime of small nonlinear interactions and strong external driving, revealing complex phase diagrams.

Contribution

It introduces the concept of dissipative phase transitions in optomechanical systems within the ultrastrong coupling regime, expanding understanding of their phase behavior.

Findings

Presence of multiple types of dissipative phase transitions.

Identification of a critical point where transition lines meet.

Rich phase diagram including bifurcations and discontinuities.

Abstract

We show that optomechanical quantum systems can undergo dissipative phase transitions within the limit of small nonlinear interaction and strong external drive. In such a defined thermodynamical limit, the nonlinear interaction stabilizes optomechanical dynamics in strong and ultrastrong coupling regimes. As a consequence optomechanical systems possess a rich phase diagram consisting of periodic orbits, discontinuous, and continuous dissipative phase transitions with and without bifurcation. We also find a critical point where continuous and discontinuous dissipative phase transition lines meet. Our analysis demonstrates that optomechanical systems are valuable for understanding the rich physics of dissipative phase transitions and ultrastrong coupling regimes.