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

Chang-Woo Lee, Jae Hoon Lee, Jae Woo Joo, Hyojun Seok

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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.
Original languageEnglish
Article number25249
Number of pages13
JournalOptics Express
Issue number14
Publication statusPublished - 4 Jul 2022

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