Quantum interface links stationary qubits in quantum memory with flying photonic qubits in optical transmission channels and constitutes a critical element for future quantum internet. Entanglement of quantum interfaces is a key step for realization of quantum networks. Through heralded detection of photon interference, here we generate multipartite entanglement between 25 (or 9) individually addressable quantum interfaces in a multiplexed atomic quantum memory array and confirm genuine 22 (or 9) partite entanglement, respectively. Experimental entanglement of a record-high number of quantum interfaces makes an important enabling step towards realization of quantum networks, long-distance quantum communication, and multipartite quantum information processing.
@article{arxiv.1707.09701,
title = {Experimental entanglement of 25 individually accessible atomic quantum interfaces},
author = {Y. -F. Pu and Y. -K. Wu and N. Jiang and W. Chang and C. Li and S. Zhang and L. -M. Duan},
journal= {arXiv preprint arXiv:1707.09701},
year = {2018}
}