A Quantum Optomechanical Transistor Based on a Cavity-Optomechanical System

TL;DR

This paper proposes a theoretical scheme for a quantum optomechanical transistor that uses a cavity-optomechanical system, enabling all-optical control of signal transmission with potential applications in optical logic and quantum communication.

Contribution

It introduces a novel all-optically controlled quantum transistor based on cavity-optomechanical interactions, demonstrating switchable amplification and attenuation of signals.

Findings

Signal gain increases abruptly with pump power

The transistor can be switched on or off by pump laser control

Potential applications in optical logic and quantum repeaters

Abstract

We theoretically propose a scheme to realize an all-optically controlled quantum optomechanical transistor based on a cavity-optomechanical system, where the cavity photons interfere with the input signal photons while the pump field controls the transmission spectrum of the signal laser. Theoretical analysis shows such a quantum optomechanical transistor can be switched on or off by turning on or off the pump laser, which corresponds to amplification or attenuation of the signal laser, respectively. The results further demonstrate that the output signal gain is enhanced abruptly with increasing the input pump power. The scheme proposed here will pave the way towards many important applications such as all-optical logic circuits and quantum repeaters.