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Entanglement-enhanced optical gyroscope

: Fink, M.; Steinlechner, F.; Handsteiner, J.; Dowling, J.P.; Scheidl, T.; Ursin, R.

Fulltext ()

New journal of physics. Online journal 21 (2019), Art. 053010, 8 pp.
ISSN: 1367-2630
Journal Article, Electronic Publication
Fraunhofer IOF ()

Fiber optic gyroscopes (FOG) based on the Sagnac effect are a valuable tool in sensing and navigation and enable accurate measurements in applications ranging from spacecraft and aircraft to self-driving vehicles such as autonomous cars. As with any classical optical sensors, the ultimate performance of these devices is bounded by the shot-noise limit (SNL). Quantum-enhanced interferometry allows us to overcome this limit using non-classical states of light. Here, we report on an entangled-photon gyroscope that uses path-entangled NOON-states (N = 2) to provide super-resolution and phase sensitivity beyond the shot-noise limit.