Squeezing-enhanced measurement sensitivity in a cavity optomechanical system

Hugo Kerdoncuff, Ulrich Busk Hoff, Glen I. Harris, Warwick P. Bowen, Ulrik Lund Andersen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We determine the theoretical limits to squeezing-enhanced measurement sensitivity of mechanical motion in a cavity optomechanical system. The motion of a mechanical resonator is transduced onto quadrature fluctuations of a cavity optical field and a measurement is performed on the optical field exiting the cavity. We compare measurement sensitivities obtained with coherent probing and quantum-enhanced probing of the mechanical motion, i.e. the coherent probe field carries vacuum states and quadrature squeezed vacuum states at sideband frequencies, respectively. We find that quantum-enhanced probing provides little to no improvement in motion sensing for resonators in the unresolved sideband regime but may significantly increase measurement sensitivities for resonators in the resolved sideband regime.
Original languageEnglish
JournalAnnalen der Physik
Volume527
Issue number1-2
Pages (from-to)107-114
Number of pages8
ISSN0003-3804
DOIs
Publication statusPublished - 2015

Keywords

  • PHYSICS,
  • STANDARD QUANTUM LIMIT
  • GROUND-STATE
  • SHOT-NOISE
  • OSCILLATOR
  • MOTION
  • FORCE
  • LIGHT
  • Cavity optomechanics
  • squeezed light
  • quantum-enhanced sensitivity
  • standard quantum limit
  • quantum‐enhanced sensitivity

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