Entanglement enhanced atomic gyroscope

TL;DR

This paper proposes a quantum-enhanced atomic gyroscope using entangled particles, achieving sensitivity limits beyond classical methods and approaching the ultimate quantum limit for rotation measurement.

Contribution

It introduces a novel scheme for an atomic gyroscope utilizing entangled ultra-cold atoms, surpassing classical sensitivity scaling.

Findings

Entanglement allows sensitivity scaling as 1/N, surpassing classical 1/√N limit.

Proposed scheme uses ultra-cold atoms in an optical ring trap.

Achieves quantum-limited precision in rotation sensing.

Abstract

The advent of increasingly precise gyroscopes has played a key role in the technological development of navigation systems. Ring-laser and fibre-optic gyroscopes, for example, are widely used in modern inertial guidance systems and rely on the interference of unentangled photons to measure mechanical rotation. The sensitivity of these devices scales with the number of particles used as $1/ \sqrt{N}$. Here we demonstrate how, by using sources of entangled particles, it is possible to do better and even achieve the ultimate limit allowed by quantum mechanics where the precision scales as 1/N. We propose a gyroscope scheme that uses ultra-cold atoms trapped in an optical ring potential.