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Entanglement-enhanced synchronous differential comparison

文献类型：期刊论文

作者Yu, Deshui3; Chen, Jingbiao2; Zhang, Shougang1,3
刊名PHYSICAL REVIEW A
出版日期2023-04-27
卷号107期号:4页码:7
ISSN号2469-9926
DOI10.1103/PhysRevA.107.043120
英文摘要Quantum entanglement of atoms enables precision measurement and frequency metrology beyond the stan-dard quantum limit that is imposed by the quantum projection noise. Here we propose employing entangled atoms in the synchronous differential measurement to enhance the detection sensitivity of spatially dependent frequency shift. Two ways of engineering entangled atoms are studied. The synchronous comparison between two pixels within an entangled atomic cloud leads to a sensitivity enhancement factor of 1.4 over the standard quantum limit. The sensitivity enhancement becomes saturated for a large number of atoms. In contrast, the synchronous comparison between two independent pixels that are individually composed of entangled atoms allows for a strong sensitivity enhancement by a factor of, for example, about 10 with 103 entangled atoms in each pixel, corresponding to a reduction of the averaging time by a factor of about 102. A large atom number may further elevate the sensitivity. Our work paves the way towards the entanglement-enhanced detection of gravitational redshift by means of the in situ imaging spectroscopy.
WOS关键词PROJECTION NOISE ; ATOMIC-CLOCK ; STABILITY
资助项目National Time Service Center, China[E239SC11]
WOS研究方向Optics ; Physics
语种英语
WOS记录号WOS:001011189900008
出版者AMER PHYSICAL SOC
资助机构National Time Service Center, China ; National Time Service Center, China ; National Time Service Center, China ; National Time Service Center, China ; National Time Service Center, China ; National Time Service Center, China ; National Time Service Center, China ; National Time Service Center, China
源URL[http://210.72.145.45/handle/361003/14203]  
专题国家授时中心_量子频标研究室
通讯作者Chen, Jingbiao
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Peking Univ, Inst Quantum Elect, Sch Elect, State Key Lab Adv Opt Commun Syst, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China
推荐引用方式
GB/T 7714		 Yu, Deshui,Chen, Jingbiao,Zhang, Shougang. Entanglement-enhanced synchronous differential comparison[J]. PHYSICAL REVIEW A,2023,107(4):7.
APA Yu, Deshui,Chen, Jingbiao,&Zhang, Shougang.(2023).Entanglement-enhanced synchronous differential comparison.PHYSICAL REVIEW A,107(4),7.
MLA Yu, Deshui,et al."Entanglement-enhanced synchronous differential comparison".PHYSICAL REVIEW A 107.4(2023):7.

入库方式： OAI收割

来源：国家授时中心

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