# Weak-force sensing with squeezed optomechanics

## TL;DR

This paper demonstrates that quantum squeezing in a nonlinear optomechanical system with an optical parametric amplifier significantly improves weak-force sensing, surpassing the standard quantum limit for high-precision measurements.

## Contribution

The study introduces a method to enhance force sensitivity in optomechanical sensors using quantum squeezing with an OPA, surpassing the standard quantum limit.

## Key findings

- Quantum noise can be suppressed by tuning OPA parameters.
- Force sensitivity is substantially enhanced, exceeding the standard quantum limit.
- Ultrahigh-precision quantum force sensing is feasible under realistic conditions.

## Abstract

We investigate quantum-squeezing-enhanced weak-force sensing via a nonlinear optomechanical resonator containing a movable mechanical mirror and an optical parametric amplifier (OPA). Herein, we determined that tuning the OPA parameters can considerably suppress quantum noise and substantially enhance force sensitivity, enabling the device to extensively surpass the standard quantum limit. This indicates that under realistic experimental conditions, we can achieve ultrahigh-precision quantum force sensing by harnessing nonlinear optomechanical devices.