Quantum-enhanced fiber-optic gyroscopes using quadrature squeezing and continuous-variable entanglement

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17 Scopus citations


We evaluate the fundamental performance of a fiber-optic gyroscope (FOG) design that is enhanced by the injection of a quantum-optical squeezed vacuum. In the presence of fiber loss, we compute the optimum attainable enhancement below the standard quantum limit in terms of the angular velocity estimator variance from a homodyne measurement. We find that currently realizable amounts of single-mode squeezing are sufficient to access the maximum quantitative improvement, but that this gain in maximum rotation sensitivity is limited to a marginal constant factor. We then propose an entanglement-enhanced FOG design that segments a fixed amount of available fiber into multiple fiber interferometers and feeds this sensor array with a multimode-entangled squeezed vacuum resource. Our design raises the fundamental improvement in sensitivity to an appreciable factor of e≈2.718.

Original languageEnglish (US)
Article number034065
JournalPhysical Review Applied
Issue number3
StatePublished - Sep 2020

ASJC Scopus subject areas

  • General Physics and Astronomy


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