Entanglement of distant optomechanical systems

TL;DR

This paper proposes a theoretical scheme to generate entanglement between distant optomechanical cavities, involving optical and mechanical modes, which remains robust at finite temperatures and with dissipation.

Contribution

It introduces a novel setup of two coupled optomechanical cavities capable of producing steady-state entanglement between distant modes.

Findings

Entanglement can be generated between distant optical and mechanical modes.

The scheme is robust against dissipation and thermal effects.

Nonlocal correlations persist at finite temperatures.

Abstract

We theoretically investigate the possibility to generate non-classical states of optical and mechanical modes of optical cavities, distant from each other. A setup comprised of two identical cavities, each with one fixed and one movable mirror and coupled by an optical fiber, is studied in detail. We show that with such a setup there is potential to generate entanglement between the distant cavities, involving both optical and mechanical modes. The scheme is robust with respect to dissipation, and nonlocal correlations are found to exist in the steady state at finite temperatures.