# Cavity-induced mirror-mirror entanglement in a single-atom Raman laser

## TL;DR

This paper proposes an experimental scheme to analyze optical bistability and generate robust entanglement between two movable mirrors in a cavity with a two-mode laser, using master and Langevin equations.

## Contribution

It introduces a novel approach to study mirror-mirror entanglement induced by cavity interactions in a Raman laser setup.

## Key findings

- Optical bistability occurs for large cavity laser detuning.
- Strong mirror-mirror entanglement is numerically demonstrated.
- Entanglement remains robust against environmental thermal effects.

## Abstract

We address an experimental scheme to analyze the optical bistability and the entanglement of two movable mirrors coupled to a two-mode laser inside a doubly resonant cavity. With this aim we investigate the master equations of the atom-cavity subsystem in conjunction with the quantum Langevin equations that describe the interaction of the mirror cavity. The parametric amplification-type coupling induced by the two-photon coherence on the optical bistability of the intracavity mean photon numbers is found and investigated. Under this condition, the optical intensities exhibit bistability for all large values of cavity laser detuning. We also provide numerical evidence for the generation of strong entanglement between the movable mirrors and show that it is robust against environmental thermalization.