Protocols and techniques for a scalable atom—photon quantum network

摘要

Quantum networks based on atomic qubits and scattered photons provide a promising way to build a large-scale quantum information processor. We review quantum protocols for generating entanglement and op-erating gates between two distant atomic qubits, which can be used for constructing scalable atom–photonquantum networks. We emphasize the crucial role of collecting light from atomic qubits for large-scale net-working and describe two techniques to enhance light collection using reflective optics or optical cavities.A brief survey of some applications for scalable and efficient atom–photon networks is also provided.