To realize a large-scale quantum network,both quantum memory and the interference of retrieved indistinguish-able photons are essentially required to perform multi-photon synchronization and quantum-interference-medi-ated entanglement swapping.Significant progress has been achieved in low-temperature and well-isolated systems.However,linking independent quantum memories at room temperature remain challenging.Here,we present an experimental demonstration of Hong-Ou-Mandel interference between single photons from two independent room-temperature quantum memories.We manage to simultaneously operate two such quan-tum memories and individually obtain a memory-built-in quantum correlation of Stokes and anti-Stokes photons by a far-off-resonance Duan-Lukin-Cirac-Zoller protocol.We also successfuilly enhance the Hong-Ou-Mandel interference rate up to about 15 times by increasing each photon rate,which is achieved by coordinating two quantum memories with a repeat-until-success fashion.We observe the visibility of quantum interference up to 75.0％without reduction of any background noise,well exceeding the classical limit of 50％.Our results,together with its straightforward,broadband,and room-temperature features,open up a promising way towards realizing large-scale quantum networks at ambient conditions.

CHAO-NI ZHANG;HANG LI;JIAN-PENG DOU;FENG LU;HONG-ZHE YANG;XIAO-LING PANG;XIAN-MIN JIN

Center for Integrated Quantum Information Technologies(IQIT),School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University,Shanghai 200240,China;CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China;TuringQ Co.,Ltd.,Shanghai 200240,China

光子学研究（英文）

[1]CHAO-NI ZHANG;HANG LI;JIAN-PENG DOU;FENG LU;HONG-ZHE YANG;XIAO-LING PANG;XIAN-MIN JIN-.Hong-Ou-Mandel interference linking independent room-temperature quantum memories)[J].光子学研究（英文）,2022(10):2388-2393

indistinguish,Lukin,Cirac,Zoller,successfuilly

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