Optomechanical Entanglement in the Presence of Laser Phase Noise

TL;DR

This paper investigates how laser phase noise impacts optomechanical entanglement, revealing that phase noise significantly affects entanglement but not ground state cooling, especially near bistability.

Contribution

It provides a detailed analysis of laser phase noise effects on optomechanical systems using covariance matrix formalism, highlighting the regime-dependent impact on entanglement and cooling.

Findings

Phase noise strongly affects optomechanical entanglement.

Ground state cooling remains feasible despite phase noise.

Bistable regime amplifies the destructive effect of phase noise.

Abstract

We study the simplest optomechanical system in the presence of laser phase noise using the covariance matrix formalism. We show that the destructive effect of the phase noise is especially strong in the bistable regime. This explains why ground state cooling is still possible in the presence of phase noise, as it happens far away from the bistable regime. On the other hand, the optomechanical entanglement is strongly affected by phase noise.