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The role of entanglement in calibrating optical quantum gyroscopes

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journal contribution
posted on 2023-06-09, 04:28 authored by Pieter Kok, Jacob DunninghamJacob Dunningham, Jason F Ralph
We consider the calibration of an optical quantum gyroscope by modeling two Sagnac interferometers, mounted approximately at right angles to each other. Reliable operation requires that we know the angle between the interferometers with high precision, and we show that a procedure akin to multi-position testing in inertial navigation systems can be generalized to the case of quantum interferometry. We find that while entanglement is a key resource within an individual Sagnac interferometer, its presence between the interferometers is a far more complicated story. The optimum level of entanglement depends strongly on the sought parameter values, and small but significant improvements may be gained from choosing states with the optimal amount of entanglement between the interferometers.

Funding

UK Quantum Technology Hub: NQIT-Networked Quantum Information Technologies; G1503; EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCIL; EP/M013243/1

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Physical Review A

ISSN

1050-2947

Publisher

American Physical Society

Issue

1

Volume

95

Article number

a2326

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Atomic, Molecular and Optical Physics Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-12-19

First Open Access (FOA) Date

2017-02-24

First Compliant Deposit (FCD) Date

2016-12-19

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