Quantum fisher information of an optomechanical force sensor driven by a squeezed vacuum field

We investigate the enhancement in sensitivity when measuring a weak force through the optical response of an optomechanical oscillator driven by squeezed light. In the context of a quantum sensor based on cavity-optomechanics, the sensitivity scaling measured by the quantum Fisher information for a squeezed vacuum state pump is compared to that for a coherent state pump. We show that squeezed state inputs can produce noise levels below the standard quantum limit and even the Heisenberg limit in given regimes. This study shows that new pathways can be opened for enhanced quantum sensing with optomechanical systems conducive to measuring various physical quantities such as gravitational force, acceleration, and acoustics. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

This study investigates the enhancement in sensitivity when measuring a weak force using the optical response of an optomechanical oscillator driven by squeezed light. The results show that squeezed state inputs can achieve noise levels below the standard quantum limit and even the Heisenberg limit in specific regimes, opening new pathways for enhanced quantum sensing with optomechanical systems in measuring various physical quantities.