Spin squeezing enhanced dual species atom interferometric accelerometer employing large momentum transfer for precision test of the equivalence principle

TL;DR

This paper proposes a theoretical scheme to enhance dual-species atom interferometers with spin squeezing and large momentum transfer, aiming for ultra-precise tests of the equivalence principle near the Heisenberg limit.

Contribution

It introduces a feasible method to apply spin squeezing in dual-species atom interferometers with large momentum transfer for high-precision equivalence principle tests.

Findings

Potential to measure the Eotvos parameter with sensitivity around 10^{-20} in space.

Identification of optimal spin squeezing protocols for such experiments.

Feasibility analysis for space-borne low Earth orbit platforms.

Abstract

We theoretically investigate the feasibility of applying spin squeezing to a light pulse atom interferometer in the presence of large momentum transfer using off-resonant Raman transitions, in order to enhance the sensitivity of accelerometry close to the Heisenberg limit. We also show how to implement this scheme in a dual-species atom interferometer for precision test of the equivalence principle by measuring the Eotvos parameter, and identify the spin squeezing protocol that is best suited for such an experiment. For a space borne platform in low earth orbit, such a scheme may eventually enable the measurement of the Eotvos parameter with a sensitivity of the order of 10^(-20).