4.8 Article

Doppler Gyroscopes: Frequency vs Phase Estimation

Journal

PHYSICAL REVIEW LETTERS
Volume 129, Issue 11, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.129.113901

Keywords

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Funding

  1. Hebrew University
  2. H2020-FETOPEN grant [828946]

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This article discusses the fundamental roles of frequency and phase in parameter estimation, specifically in the Sagnac effect. A novel, ultrasensitive gyroscope based on the steep frequency-dependent gain of a liquid crystal light valve is described. Compelling experimental evidence is provided to illustrate the fundamental importance of the Doppler shift in the Sagnac effect, resolving a long-debated question. Experimental results show orders of magnitude improvement in sensitivity compared to the standard quantum limit of a phase estimation-based gyroscope.
We consider the fundamental roles of frequency versus phase in parameter estimation, specifically in the Sagnac effect. We describe a novel, ultrasensitive gyroscope based on the extremely steep frequency-dependent gain of a liquid crystal light valve. We provide compelling experimental evidence that the Doppler shift is fundamental in the Sagnac effect giving clarity to a long-debated question. We experimentally show orders of magnitude improvement in sensitivity relative to the standard quantum limit of a gyroscope based on phase estimation.

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