Quantum-enhanced metrology for multiple phase estimation with noise

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	Quantum-enhanced metrology for multiple phase estimation with noise
	Yue, JD ; Zhang, YR ; Fan, H
刊名	SCIENTIFIC REPORTS
	2014
通讯作者	Fan, H (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	We present a general quantum metrology framework to study the simultaneous estimation of multiple phases in the presence of noise as a discretized model for phase imaging. This approach can lead to nontrivial bounds of the precision for multiphase estimation. Our results show that simultaneous estimation (SE) of multiple phases is always better than individual estimation (IE) of each phase even in noisy environment. The utility of the bounds of multiple phase estimation for photon loss channels is exemplified explicitly. When noise is low, those bounds possess the Heisenberg scale showing quantum-enhanced precision with the O(d) advantage for SE, where d is the number of phases. However, this O(d) advantage of SE scheme in the variance of the estimation may disappear asymptotically when photon loss becomes significant and then only a constant advantage over that of IE scheme demonstrates. Potential application of those results is presented.
资助信息	973'' program [2010CB922904]; NSFC [11175248]; Chinese Academy of Sciences This work is supported by 973'' program (2010CB922904), NSFC (11175248), and grants from Chinese Academy of Sciences.
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59704]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Yue, JD,Zhang, YR,Fan, H. Quantum-enhanced metrology for multiple phase estimation with noise[J]. SCIENTIFIC REPORTS,2014.
APA	Yue, JD,Zhang, YR,&Fan, H.(2014).Quantum-enhanced metrology for multiple phase estimation with noise.SCIENTIFIC REPORTS.
MLA	Yue, JD,et al."Quantum-enhanced metrology for multiple phase estimation with noise".SCIENTIFIC REPORTS (2014).