Entangler via Electromagnetically Induced Transparency with Atomic Ensembles

TL;DR

This paper proposes a scheme to generate multiple entangled optical fields using electromagnetically induced transparency in atomic ensembles, enabling scalable quantum communication and networks.

Contribution

It introduces a novel entangler based on atomic spin waves in EIT, capable of producing multiple nondegenerate entangled fields for quantum information applications.

Findings

Efficient generation of multiple entangled optical fields demonstrated.

Atomic spin wave acts as a versatile entangler.

Potential for scalable quantum communication networks.

Abstract

We present an efficient and convenient scheme to entangle multiple optical fields via electromagnetically induced transparency in an atomic ensemble. The atomic spin wave, produced through electromagnetically induced transparency in the Lambda-type configuration in an atomic ensemble, can be described by a Bose operator and acts as the entangler. By using the entangler, any desired number of nondegenerate narrow-band continuous-variable entangled fields, in principle, can be generated through stimulated Raman scattering processes, which holds great promise for applications in scalable quantum communication and quantum networks.