Extreme Spin Squeezing via Optimized One-Axis Twisting and Rotations

TL;DR

This paper introduces a new method combining one-axis twisting and rotations to generate highly squeezed states for quantum metrology, achieving near-Heisenberg limit sensitivity even under practical constraints.

Contribution

It presents an experimentally feasible scheme that optimizes spin squeezing for Ramsey interferometry, maintaining Heisenberg scaling despite realistic limitations.

Findings

Achieves Heisenberg-limited metrological gain

Maintains optimal squeezing under pulse constraints

Robust against photon scattering losses

Abstract

We propose a novel scheme for the generation of optimal squeezed states for Ramsey interferometry. The scheme consists of an alternating series of one-axis twisting pulses and rotations, both of which are straightforward to implement experimentally. The resulting states show a metrological gain proportional to the Heisenberg limit. We demonstrate that the Heisenberg scaling is maintained even when placing constraints on the amplitude of the pulses implementing the one-axis twisting and when taking into account realistic losses due to photon scattering.