Entanglement-enhanced optical gyroscope

TL;DR

This paper demonstrates an entangled-photon optical gyroscope that surpasses the standard quantum limit by utilizing path-entangled NOON-states, enhancing phase sensitivity for precise navigation and sensing applications.

Contribution

It introduces a novel entangled-photon gyroscope employing NOON-states to achieve quantum-enhanced phase sensitivity beyond classical limits.

Findings

Achieved phase supersensitivity using entangled photons

Demonstrated surpassing the standard quantum limit in gyroscope performance

Potential for improved navigation and sensing accuracy

Abstract

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 standard quantum limit (SQL). 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 phase supersensitivity beyond the standard-quantum-limit.