| Entanglement-enhanced synchronous differential comparison | |
| Yu, Deshui1; Chen, Jingbiao2; Zhang, Shougang1,3 | |
| 2023-04-27 | |
| 发表期刊 | PHYSICAL REVIEW A
 |
| ISSN | 2469-9926 |
| 卷号 | 107期号:4页码:7 |
| 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. |
| 资助者 | 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 |
| DOI | 10.1103/PhysRevA.107.043120 |
| 关键词[WOS] | PROJECTION NOISE ; ATOMIC-CLOCK ; STABILITY |
| 语种 | 英语 |
| 资助项目 | National Time Service Center, China[E239SC11] |
| 资助者 | 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 |
| WOS研究方向 | Optics ; Physics |
| WOS类目 | Optics ; Physics, Atomic, Molecular & Chemical |
| WOS记录号 | WOS:001011189900008 |
| 出版者 | AMER PHYSICAL SOC |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://210.72.145.45/handle/361003/14203 |
| 专题 | 量子频标研究室 |
| 通讯作者 | Chen, Jingbiao |
| 作者单位 | 1.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China 2.Peking Univ, Inst Quantum Elect, Sch Elect, State Key Lab Adv Opt Commun Syst, Beijing 100871, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, 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. |
| 条目包含的文件 | 条目无相关文件。 | |||||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论