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The realization of a quantum network node of matter-based qubits compatiblewith telecom-band operation and large-scale quantum information processing isan outstanding challenge that has limited the potential of elementary quantumnetworks. We propose a platform for interfacing quantum processors comprisingneutral atom arrays with telecom-band photons in a multiplexed networkarchitecture. The use of a large atom array instead of a single atom mitigatesthe deleterious effects of two-way communication and improves the entanglementrate between two nodes by nearly two orders of magnitude. Further, this systemsimultaneously provides the ability to perform high-fidelity deterministicgates and readout within each node, opening the door to quantum repeater andpurification protocols to enhance the length and fidelity of the network,respectively. Using intermediate nodes as quantum repeaters, we demonstrate thefeasibility of entanglement distribution over approximately 1500 km based onrealistic assumptions, providing a blueprint for a transcontinental network.Finally, we demonstrate that our platform can distribute approximately 25 Bellpairs over metropolitan distances, which could serve as the backbone of adistributed fault-tolerant quantum computer.

Multiplexed telecom-band quantum networking with atom arrays in optical cavities