TOWARDS HYBRID QUANTUM NETWORKING: INTERFACING ION TRAPS WITH NEUTRAL ATOM SYSTEMS

Abstract

Building large-scale modular quantum computers and quantum networks require scalable high fidelity, high efficiency, and long lifetime quantum memories [1]. Quantum memories are proposed to increase photon-mediated matter-qubit entanglement rates by synchronizing photon interference between network nodes [2]. Hybrid quantum networkingleverages trapped ions’ high fidelity operations and neutral-atoms’ single photon manipulation for increased entanglement rates over single-species quantum networks [3, 4, 5, 6, 7, 8]. Here, we aim to demonstrate flying-qubit photon storage in a neutral-atom system using frequency-converted photons entangled with a trapped barium ion. The quantum information encoded in the flying qubit’s polarization states is reversibly mapped to a multiplexed dual-rail encoding scheme during storage. This work helps enable long-distance quantum networking by synthesizing hybrid components in entanglement distribution [9].