Storage of polarization-encoded cluster states in an atomic system

TL;DR

This paper proposes a method to store and retrieve polarization-encoded cluster state entanglement in atomic ensembles using electromagnetically induced transparency, advancing quantum memory technology.

Contribution

It introduces a scheme for mapping cluster-type polarization entanglement onto atomic ensembles and discusses its efficiency, lifetime, and limitations.

Findings

Successful mapping of polarization entanglement onto atomic ground states

Retrieval of stored entanglement demonstrated via EIT

Analysis of efficiency and lifetime of the quantum memory

Abstract

We present a scheme for entanglement macroscopic atomic ensembles which are four spatially separate regions of an atomic cloud using cluster-correlated beams. We show that the cluster-type polarization-encoded entanglement could be mapped onto the long-lived collective ground state of the atomic ensembles, and the stored entanglement could be retrieved based on the technique of electromagnetically induced transparency. We also discuss the efficiency of, the lifetime of, and some quantitative restrictions to the proposed quantum memory.