Generation of Multipartite Continuous-variable Entanglements via Atomic Spin Wave

TL;DR

This paper proposes a method to generate multipartite continuous-variable entanglements using atomic spin waves in an atomic ensemble, enabling flexible creation of multicolor entangled fields for quantum information applications.

Contribution

It introduces a novel approach leveraging atomic spin waves in a Lambda-type EIT setup to produce multipartite entanglements with potential for scalable quantum networks.

Findings

Successful generation of quantum correlated and entangled Stokes and anti-Stokes fields

Method can be extended to create multicolor multipartite entangled fields

Long correlation times achieved for quantum information processing

Abstract

We present a proof-of-principle way to generate nondegenerate multipartite continuous-variable entanglements via atomic spin wave induced by the strong coupling and probe fields in the Lambda-type electromagnetically induced transparency configuration in an atomic ensemble. Quantum correlated/anti-correlated and entangled Stokes and anti-Stokes fields, simultaneously produced through scattering the applied laser fields off the atomic spin wave, can be achieved. This method can, in principle, be extended to flexibly and conveniently create multicolor multipartite entangled narrow-band fields to any desired order with long correlation time, which may find promising applications in quantum information processing and quantum networks.