Approaching quantum-limited amplification with large gain catalyzed by hybrid nonlinear media in cavity optomechanics

TL;DR

This paper proposes a hybrid nonlinear cavity amplifier combining Kerr and OPA media, achieving large gain and reaching the quantum limit for minimal added noise in quantum measurements.

Contribution

It introduces a novel hybrid nonlinear cavity design that unconditionally attains quantum-limited amplification with large gain.

Findings

Achieves large gain in the stable regime

Reaches quantum limit unconditionally

Operates effectively for weak signal amplification

Abstract

Amplifier is at the heart of almost all experiment carrying out the precise measurement of a weak signal. An idea amplifier should have large gain and minimum added noise simultaneously. Here, we consider the quantum measurement properties of a hybrid nonlinear cavity with the Kerr and OPA nonlinear media to amplify an input signal. We show that our hybrid-nonlinear-cavity amplifier has large gain in the single-value stable regime and achieves quantum limit unconditionally.