Squeezed-light-driven force detection with an optomechanical cavity in a Mach-Zehnder interferometer.

Abstract:

:We analyze the performance of a force detector based on balanced measurements with a Mach-Zehnder interferometer incorporating a standard optomechanical cavity. The system is driven by a coherent superposition of coherent light and squeezed vacuum field, providing quantum correlation along with optical coherence in order to enhance the measurement sensitivity beyond the standard quantum limit. We analytically find the optimal measurement strength, squeezing direction, and squeezing strength at which the symmetrized power spectral density for the measurement noise is minimized below the standard quantum limit. This force detection scheme based on a balanced Mach-Zehnder interferometer provides better sensitivity compared to that based on balanced homodyne detection with a local oscillator in the low frequency regime.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Lee CW,Lee JH,Seok H

doi

10.1038/s41598-020-74629-1

subject

Has Abstract

pub_date

2020-10-15 00:00:00

pages

17496

issue

1

issn

2045-2322

pii

10.1038/s41598-020-74629-1

journal_volume

10

pub_type

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