Narrowband photonic quantum entanglement with counterpropagating domain engineering

被引：9
|
作者：
Liu, Yi-Chen [1 ]
Guo, Dong-Jie [1 ]
Yang, Ran [1 ]
Sun, Chang-Wei [1 ]
Duan, Jia-Chen [1 ]
Gong, Yan-Xiao [1 ]
Xie, Zhenda [1 ]
Zhu, Shi-Ning [1 ]
机构：
[1] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Sch Elect Sci & Engn, Natl Lab Solid State Microstruct,Sch Phys, Nanjing 210093, Peoples R China
来源：
PHOTONICS RESEARCH | 2021年 / 9卷 / 10期
基金：
中国国家自然科学基金;
关键词：
TIME; COMPUTATION; GENERATION; STORAGE; MEMORY;
D O I：
10.1364/PRJ.413075
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Narrowband photonic entanglement is a crucial resource for long-distance quantum communication and quantum information processing, including quantum memories. We demonstrate the first polarization entanglement with 7.1 GHz inherent bandwidth by counterpropagating domain engineering, which is also confirmed by Hong Ou -Mandel interference with 155-ps base-to-base dip width and (97.1 +/- 0.59)% high visibility. The entanglement is harnessed with 18.5-standard-deviations Bell inequality violation, and further characterized with state tomography of (95.71 +/- 0.61)% fidelity. Such narrowband entanglement sets a cornerstone for practical quantum information applications. (C) 2021 Chinese Laser Press
引用
收藏
页码：1998 / 2005
页数：8
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