Quantum-Limited Amplification of Cavity Optomechanics without Resolved Sideband Condition

TL;DR

This paper introduces a new scheme for quantum-limited, phase-preserving amplification in cavity optomechanics that does not require the resolved sideband condition, significantly increasing the gain-bandwidth product.

Contribution

It presents a novel approach using an additional cavity to achieve tunable, high-performance amplification without the resolved sideband constraint.

Findings

Gain-bandwidth product is about ten times larger than previous methods.

Amplification is phase-preserving and quantum-limited.

Operating frequency can be continuously tuned by adjusting cavity coupling.

Abstract

We propose a scheme to realize the phase-preserving amplification without the restriction of resolved sideband condition. As a result, our gain-bandwidth product is about one magnitude larger than the existing proposals. In our model, an additional cavity is coupled to the cavity-optomechanical system. Therefore our operating frequency is continuously tunable via adjusting the coupling coefficient of the two cavities.