Long-Distance Entanglement between a Multiplexed Quantum Memory and a Telecom Photon

被引：34

作者：

Chang, W. ^{[1
]}

Li, C. ^{[1
]}

Wu, Y. -K. ^{[1
]}

Jiang, N. ^{[1
]}

Zhang, S. ^{[1
]}

Pu, Y. -F. ^{[1
]}

Chang, X. -Y. ^{[1
]}

Duan, L. -M. ^{[1
]}

机构：

[1] Tsinghua Univ, Inst Interdisciplinary Informat Sci, Ctr Quantum Informat, Beijing 100084, Peoples R China

来源：

PHYSICAL REVIEW X | 2019年 / 9卷 / 04期

关键词：

ELECTROMAGNETICALLY INDUCED TRANSPARENCY; ATOMIC ENSEMBLES; COMMUNICATION; REPEATERS; INTERFACE; STORAGE; LIGHT;

D O I：

10.1103/PhysRevX.9.041033

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Realization of long-distance quantum communication through the quantum repeater network requires a combination of some key elements, including a multiplexed quantum memory for storage of entanglement and a telecom photon for propagation of information through the fiber. Although impressive experimental advances have demonstrated the individual elements, combining these key capabilities together and realizing them in a single experimental system remains a significant challenge. Here, we report an experimental realization of long-distance entanglement between a multiplexed quantum memory with 49 individually accessible memory cells and a telecom photon after transmission in a 10-km optical fiber. Excitation of an atomic ensemble generates narrow-band polarization entanglement between a telecom photon of 1530-nm wavelength and another photon of 780-nm wavelength, which is then stored into a memory cell of a multiplexed atomic quantum memory and read out after a controllable delay. The entanglement is verified through quantum-state tomography after quantum storage in the atomic memory and fiber transmission of the telecom photon. This experiment demonstrates an important step towards realization of long-distance quantum communication networks.

引用

页数：9

共 40 条

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