Implementation of field two-way quantum synchronization of distant clocks across a 7 km deployed fiber link

doi:10.1364/OE.451172

NTSC-IR > 量子频标研究室

	Implementation of field two-way quantum synchronization of distant clocks across a 7 km deployed fiber link
	Quan, Runai 1,2; Hong, Huibo 1,2; Xue, Wenxiang 1; Quan, Honglei 1,2; Zhao, Wenyu 1; Xiang, Xiao 1,2; Liu, Yuting 1,2; Cao, Mingtao 1; Liu, Tao 1,2; Zhang, Shougang 1,2; Dong, Ruifang 1,2
	2022-03-28
发表期刊	OPTICS EXPRESS
ISSN	1094-4087
卷号	30 期号:7 页码:10269-10279
摘要	The two-way quantum clock synchronization has been shown to provide femtosecond-level synchronization capability and security against symmetric delay attacks, thus becoming a prospective method to compare and synchronize distant clocks with enhanced precision and safety. In this letter, a field test of two-way quantum synchronization between a H-maser and a Rb clock linked by a 7 km-long deployed fiber is implemented by using time-energy entangled photon-pair sources. Limited by the intrinsic frequency stability of the Rb clock, the achieved time stability at 30 s is measured as 32 ps. By applying a fiber-optic microwave frequency transfer technology to build frequency syntonization between the separated clocks, the limit set by the intrinsic frequency stability of the Rb clock is overcome. A significantly improved time stability of 1.9 ps at 30 s is achieved, which is mainly restrained by the low number of acquired photon pairs due to the low sampling rate of the utilized coincidence measurement system. Such implementation demonstrates the high practicability of the two-way quantum clock synchronization method for promoting field applications. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
资助者	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Western Young Scholar Project of CAS ; Western Young Scholar Project of CAS ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Western Young Scholar Project of CAS ; Western Young Scholar Project of CAS ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Western Young Scholar Project of CAS ; Western Young Scholar Project of CAS ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Western Young Scholar Project of CAS ; Western Young Scholar Project of CAS ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences
DOI	10.1364/OE.451172
关键词[WOS]	TIME TRANSFER
语种	英语
资助项目	National Natural Science Foundation of China[12033007] ; National Natural Science Foundation of China[61801458] ; National Natural Science Foundation of China[61875205] ; National Natural Science Foundation of China[91836301] ; Key Research Program of Frontier Science, Chinese Academy of Sciences[QYZDB-SW-SLH007] ; Strategic Priority Research Program of CAS[XDC07020200] ; Chinese Academy of Sciences Key Project[ZDRW-KT-2019-1-0103] ; Western Young Scholar Project of CAS[XAB2019B15] ; Western Young Scholar Project of CAS[XAB2019B17] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2021408] ; West Light Foundation of the Chinese Academy of Sciences[29202082]
资助者	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Western Young Scholar Project of CAS ; Western Young Scholar Project of CAS ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Western Young Scholar Project of CAS ; Western Young Scholar Project of CAS ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Western Young Scholar Project of CAS ; Western Young Scholar Project of CAS ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; Western Young Scholar Project of CAS ; Western Young Scholar Project of CAS ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences
WOS研究方向	Optics
WOS类目	Optics
WOS记录号	WOS:000781665200005
出版者	Optica Publishing Group
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/13834
专题	量子频标研究室
通讯作者	Zhang, Shougang; Dong, Ruifang
作者单位	1.Chinese Acad Sci, Natl Time Serv Ctr, Key Lab Time & Frequency Primary Stand, Xian 710600, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Quan, Runai,Hong, Huibo,Xue, Wenxiang,et al. Implementation of field two-way quantum synchronization of distant clocks across a 7 km deployed fiber link[J]. OPTICS EXPRESS,2022,30(7):10269-10279.
APA	Quan, Runai.,Hong, Huibo.,Xue, Wenxiang.,Quan, Honglei.,Zhao, Wenyu.,...&Dong, Ruifang.(2022).Implementation of field two-way quantum synchronization of distant clocks across a 7 km deployed fiber link.OPTICS EXPRESS,30(7),10269-10279.
MLA	Quan, Runai,et al."Implementation of field two-way quantum synchronization of distant clocks across a 7 km deployed fiber link".OPTICS EXPRESS 30.7(2022):10269-10279.