A hybrid method of generating spin-squeezed states for quantum-enhanced atom interferometry

TL;DR

This paper proposes a hybrid spin-squeezing method combining QND and OAT techniques to enhance quantum sensitivity in atom interferometry, especially under limited interaction strengths, with potential for practical experimental implementation.

Contribution

The paper introduces a novel hybrid spin-squeezing approach that outperforms individual methods under realistic interaction constraints.

Findings

Hybrid scheme outperforms individual QND and OAT methods.

Effective under limited interaction strengths.

Compatible with existing experimental setups.

Abstract

We introduce a new spin-squeezing technique that is a hybrid of two well established spin-squeezing techniques, quantum nondemolition measurement (QND) and one-axis twisting (OAT). This hybrid method aims to improve spin-squeezing over what is currently achievable using QND and OAT. In practical situations, the strength of both the QND and OAT interactions is limited. We found that in these situations, the hybrid scheme performed considerably better than either OAT or QND used in isolation. As QND and OAT have both been realised experimentally, this technique could be implemented in current atom interferometry setups with only minor modifications to the experiment.