Gravitational effects on entangled states and interferometer with entangled atoms

TL;DR

This paper explores how gravitational fields influence entangled quantum systems and proposes an enhanced interferometer using entangled atoms to detect gravity-induced phase shifts with increased sensitivity.

Contribution

It introduces a scheme that uses entangled atoms to improve interferometer sensitivity, enabling laboratory observation of gravity-induced phase shifts.

Findings

Entanglement of n atoms enhances sensitivity by n^2 times.

Proposed experimental setup can detect gravity-induced phase shifts.

Quantum correlations improve measurement precision in gravitational fields.

Abstract

It is discussed how systems of quantum-correlated (entangled)particles or atoms behave in external gravitational fields and what gravitational effects may exist in such systems. An experimental setup is proposed which improves the sensitivity of the Ramsey interferometer by the usage of quantum-correlated atoms. Entanglement of $n$ atoms improves the sensitivity to small phase shifts in $n^2$ times. This scheme may be used for observing gravity-induced phase shifts in laboratory.