Fiber-optic two-way quantum time transfer with frequency-entangled pulses

doi:10.1103/PhysRevA.100.023849

	Fiber-optic two-way quantum time transfer with frequency-entangled pulses
	Hou, Feiyan 1; Quan, Runai 1; Dong, Ruifang 1; Xiang, Xiao 1; Li, Baihong 1,2; Liu, Tao 1; Yang, Xiaoyan 3,4; Li, Hao 3,4; You, Lixing 3,4; Wang, Zhen 3,4
刊名	PHYSICAL REVIEW A
	2019-08-29
卷号	100 期号:2 页码:8
ISSN号	2469-9926
DOI	10.1103/PhysRevA.100.023849
英文摘要	High-precision time transfer is of fundamental interest in physics and metrology. Quantum time transfer technologies that use frequency-entangled pulses and their coincidence detection have been proposed, offering potential enhancements in precision and better guarantees of security. In this paper, we describe a fiber-optic two-way quantum time transfer experiment. Using quantum nonlocal dispersion cancellation, time transfer over a 20-km fiber link achieves a time deviation of 922 fs over 5 s and 45 fs over 40 960 s. The time transfer accuracy as a function of fiber lengths from 15 m to 20 km is also investigated, and an uncertainty of 2.46 ps in standard deviation is observed. In comparison with its classical counterparts, the fiber-optic two-way quantum time transfer setup shows appreciable improvement, and further enhancements could be obtained by using new event timers with subpicosecond precision and single-photon detectors with lower timing jitter for optimized coincidence detection. Combined with its security advantages, the femtosecond-scale two-way quantum time transfer is expected to have numerous applications in high-precision middle-haul synchronization systems.
资助项目	National Natural Science Foundation of China[91336108] ; National Natural Science Foundation of China[11273024] ; National Natural Science Foundation of China[91636101] ; National Natural Science Foundation of China[91836301] ; National Natural Science Foundation of China[61801458] ; National Natural Science Foundation of China[61875205] ; National Natural Science Foundation of China[61025023] ; Research Equipment Development Project of the Chinese Academy of Sciences ; National Youth Talent Support Program of China[[2013]33] ; National Key R&D Program of China[2017YFA0304000] ; Frontier Science Key Research Project of the Chinese Academy of Sciences[QYZDB-SSW-SLH007] ; Frontier Science Key Research Project of the Chinese Academy of Sciences[QYZDB-SSW-JSC013]
WOS关键词	CLOCK SYNCHRONIZATION ; OPTICAL-FIBER ; RF FREQUENCY ; FEMTOSECOND ; LINK ; CANCELLATION ; REALIZATION ; UNCERTAINTY ; COHERENCE ; DISTANCE
WOS研究方向	Optics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000483043300005
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Research Equipment Development Project of the Chinese Academy of Sciences ; Research Equipment Development Project of the Chinese Academy of Sciences ; National Youth Talent Support Program of China ; National Youth Talent Support Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Frontier Science Key Research Project of the Chinese Academy of Sciences ; Frontier Science Key Research Project of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Research Equipment Development Project of the Chinese Academy of Sciences ; Research Equipment Development Project of the Chinese Academy of Sciences ; National Youth Talent Support Program of China ; National Youth Talent Support Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Frontier Science Key Research Project of the Chinese Academy of Sciences ; Frontier Science Key Research Project of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Research Equipment Development Project of the Chinese Academy of Sciences ; Research Equipment Development Project of the Chinese Academy of Sciences ; National Youth Talent Support Program of China ; National Youth Talent Support Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Frontier Science Key Research Project of the Chinese Academy of Sciences ; Frontier Science Key Research Project of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Research Equipment Development Project of the Chinese Academy of Sciences ; Research Equipment Development Project of the Chinese Academy of Sciences ; National Youth Talent Support Program of China ; National Youth Talent Support Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Frontier Science Key Research Project of the Chinese Academy of Sciences ; Frontier Science Key Research Project of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://210.72.145.45/handle/361003/11992]
专题	中国科学院国家授时中心
通讯作者	Dong, Ruifang; You, Lixing
作者单位	1.Chinese Acad Sci, Key Lab Time & Frequency Primary Stand, Natl Time Serv Ctr, Xian 710600, Shaanxi, Peoples R China 2.Xian Univ Sci & Technol, Coll Sci, Xian 710054, Shaanxi, Peoples R China 3.Chinese Acad Sci, State Key Lab Funct Mat Informat, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China 4.Chinese Acad Sci, Ctr Excellence Superconducting Elect, Shanghai 200050, Peoples R China
推荐引用方式 GB/T 7714	Hou, Feiyan,Quan, Runai,Dong, Ruifang,et al. Fiber-optic two-way quantum time transfer with frequency-entangled pulses[J]. PHYSICAL REVIEW A,2019,100(2):8.
APA	Hou, Feiyan.,Quan, Runai.,Dong, Ruifang.,Xiang, Xiao.,Li, Baihong.,...&Zhang, Shougang.(2019).Fiber-optic two-way quantum time transfer with frequency-entangled pulses.PHYSICAL REVIEW A,100(2),8.
MLA	Hou, Feiyan,et al."Fiber-optic two-way quantum time transfer with frequency-entangled pulses".PHYSICAL REVIEW A 100.2(2019):8.