Role of entanglement in calibrating optical quantum gyroscopes

Kok, P, Dunningham, J and Ralph, JF ORCID: 0000-0002-4946-9948
(2017) Role of entanglement in calibrating optical quantum gyroscopes. Physical Review A, 95 (1).

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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 multiposition 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.

Item Type: Article
Additional Information: 5 pages, 2 figures
Uncontrolled Keywords: quant-ph, quant-ph, Quantum theory, Quantum entanglement
Depositing User: Symplectic Admin
Date Deposited: 02 Feb 2017 09:07
Last Modified: 14 Jan 2022 15:11
DOI: 10.1103/PhysRevA.95.012326
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