Spin Squeezing with Coherent Light via Entanglement Swapping

TL;DR

This paper presents a theoretical scheme for generating spin squeezing by continuously swapping atom-photon entanglement into atom-atom entanglement, with an explicit experimental proposal demonstrating robustness against perturbations.

Contribution

It introduces a novel entanglement swapping scheme for spin squeezing and provides an explicit, robust experimental setup for implementation.

Findings

Scheme effectively produces spin squeezing via entanglement swapping

Proposed system is robust against perturbations

Explicit experimental realization is feasible

Abstract

We analyze theoretically a scheme that produces spin squeezing via the continuous swapping of atom-photon entanglement into atom-atom entanglement, and propose an explicit experimental system where the necessary atom-field coupling can be realized. This scheme is found to be robust against perturbations due to other atom-field coupling channels.