Weak-force sensing in an optomechanical system with squeezed light and feedback control
Phys. Rev. A 113, 043518 – Published 17 April, 2026
DOI: https://doi.org/10.1103/9tkg-6xxc
Abstract
We propose a high-precision weak-force sensing scheme with squeezed light and feedback control in an unresolved-sideband cavity optomechanical system. This scheme employs synergistic integration of the injection of squeezed light and measurement-based feedback control. We analyze the influence mechanism of various system parameters and examine how squeezed light and closed-loop control jointly improve the measurement sensitivity. The proposed weak-force sensing scheme could improve the signal-to-noise ratio of the weak-force measurement and reduce the added noises. It is compatible with state-of-the-art cavity optomechanical techniques and may find applications in quantum metrology, gravitational wave detection, and fundamental physics tests.
