Few qubit atom-light interfaces with collective encoding

TL;DR

This paper proposes a scheme to build few-qubit quantum registers using small atomic samples with collective encoding, enabling efficient quantum information storage, transmission, and entanglement protocols for scalable quantum networks.

Contribution

It introduces a novel approach to create few-qubit quantum registers in atomic samples leveraging collective encoding and Rydberg interactions for quantum communication.

Findings

Efficient cooperative light absorption and emission demonstrated.

Potential for scalable quantum computing and long-distance communication.

Utilization of entanglement pumping protocols in atomic ensembles.

Abstract

Samples with few hundred atoms within a few micrometer sized region of space are large enough to provide efficient cooperative absorption and emission of light, and small enough to ensure strong dipole-dipole interactions when atoms are excited into high-lying Rydberg states. Based on a recently proposed collective encoding scheme, we propose to build few-qubit quantum registers in such samples. The registers can store and transmit quantum information in the form of single photons, and they can employ entanglement pumping protocols to perform ideally in networks for scalable quantum computing and long distance quantum communication.