Enhanced output entanglement with reservoir engineering

TL;DR

This paper investigates how reservoir engineering by shifting filter frequency can enhance output entanglement in a three-mode optomechanical system, providing analytical insights and optimal parameters for maximum entanglement.

Contribution

It introduces a novel method of reservoir engineering through filter frequency shift to optimize output entanglement in optomechanical systems.

Findings

Bandwidth suppression of entanglement near resonance

Optimal center frequency for maximum entanglement

Optimal time delay for large filter bandwidth

Abstract

We study the output entanglement in a three-mode optomechanical system via reservoir engineering by shifting the center frequency of filter function away from resonant frequency. We find the bandwidth of the filter function can suppress the entanglement in the vicinity of resonant frequency of the system, while the entanglement will become prosperous if the center frequency departs from the resonant frequency. We obtain the approximate analytical expressions of the output entanglement, and from which we give the optimal center frequency at which the entanglement takes the maximum. Furthermore, we study the effects of time delay between the two output fields on the output entanglement, and obtain the optimal time delay for the case of large filter bandwidth.