Mechanical EPR entanglement with a finite-bandwidth squeezed reservoir

TL;DR

This paper proposes a scheme for entangling mechanical resonators using a finite-bandwidth squeezed reservoir, enabling steady-state entanglement beyond the resolved sideband regime and scalable to multiple resonators.

Contribution

It introduces a novel method employing a squeezed reservoir with finite bandwidth for efficient mechanical entanglement beyond traditional regimes.

Findings

Achieves steady-state entanglement of mechanical resonators

Effective beyond the resolved sideband regime

Scalable to multiple resonators in a star-like network

Abstract

We describe a scheme for entangling mechanical resonators which is efficient also beyond the resolved sideband regime. It employs the radiation pressure force of the squeezed light produced by a degenerate optical parametric oscillator, which acts as a reservoir of quantum correlations (squeezed reservoir), and it is effective when the spectral bandwidth of the reservoir and the fields frequencies are appropriately selected. It allows for the steady state preparation of mechanical resonatrs in entangled EPR states and can be extended to the preparation of many entangled pairs of resonators which interact with the same light field, in a situation in which the optomechanical system realizes a star-like harmonic network.