Strong squeezing and perfect one-way EPR steering in electro-optomechanical system

TL;DR

This paper demonstrates how a three-mode electro-optomechanical system can achieve strong squeezing of microwave and mechanical modes, and generate controllable, robust one-way EPR steering, advancing quantum communication technologies.

Contribution

It introduces a method to realize strong squeezing and perfect one-way EPR steering in an electro-optomechanical system through controlled driving, with robustness against temperature effects.

Findings

Achieves strong squeezing of microwave and mechanical modes.

Generates perfect one-way EPR steering controllable by system driving.

Demonstrates robustness of quantum correlations against environmental temperature.

Abstract

We consider a three-mode electro-optomechanical system in which a mechanical oscillator is coupled to an optical cavity and a LC circuit through radiation pressure and capacitive coupling, respectively. By controlling the two-tone driving of the optical cavity and the microwave driving of the LC circuit, the strong squeezing of both the microwave field of the LC circuit and the mechanical mode will be obtained. Moreover, by further altering the driving power of the system, the perfect one-way Einstein-Podolsky-Rosen (EPR) steering between the optical cavity and the mechanical oscillator will be generated. The degree of the one-way EPR steering can be controlled by the driving light of the system. We also show the robustness of the squeezing and EPR steering against environmental temperature. This scheme may provide a promising platform for quantum information processing and microwave quantum communication.