An architecture for quantum networking of neutral atom processors

TL;DR

This paper proposes a two-species neutral atom quantum network architecture that integrates optical trapping and cavity-enhanced photon collection to enable high-rate remote entanglement, advancing quantum communication capabilities.

Contribution

It introduces a novel two-species architecture combining atom-photon entanglement with local processing, utilizing optical cavities for efficient remote entanglement generation.

Findings

Remote entanglement rates > 1000 s^{-1} predicted with optimized cavity finesse.

Integration of laser cooling within the cavity eliminates the need for atom transport.

Comparison of free space and cavity-based photon collection approaches.

Abstract

Development of a network for remote entanglement of quantum processors is an outstanding challenge in quantum information science. We propose and analyze a two-species architecture for remote entanglement of neutral atom quantum computers based on integration of optically trapped atomic qubit arrays with fast optics for photon collection. One of the atomic species is used for atom-photon entanglement, and the other species provides local processing. We compare the achievable rates of remote entanglement generation for two optical approaches: free space photon collection with a lens and a near-concentric, long working distance resonant cavity. Laser cooling and trapping within the cavity removes the need for mechanical transport of atoms from a source region, which allows for a fast repetition rate. Using optimized values of the cavity finesse, remote entanglement generation rates $> 10^3~\rm s^{-1}$ are predicted for experimentally feasible parameters.