Exponentially Enhanced Quantum Non-Hermitian Sensing via Optimized Coherent Drive

doi:10.1103/PhysRevApplied.17.014034

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	Exponentially Enhanced Quantum Non-Hermitian Sensing via Optimized Coherent Drive
	Bao, Liying 1,2; Qi, Bo 1,2; Dong, Daoyi 3
	2022-01-26
发表期刊	PHYSICAL REVIEW APPLIED
ISSN	2331-7019
卷号	17 期号:1 页码:18
摘要	Distinct non-Hermitian dynamics has demonstrated its advantages in improving measurement precision over traditional sensing protocols. Multimode non-Hermitian lattice dynamics can provide exponentially enhanced quantum sensing where the quantum Fisher information (QFI) per photon increases exponentially with the lattice size. However, it has also been shown that the quintessential non-Hermitian skin effect does not provide any true advantage. In this paper, we demonstrate the importance of optimizing the phase of the coherent drive and the position of the injection and detection in multimode non-Hermitian quantum sensing. The QFI per photon can be exponentially enhanced or exponentially reduced depending on the parameters of the drive and detection. Specifically, it is demonstrated that for large amplification, by choosing appropriate coherent drive parameters, the non-Hermitian skin effect can provide exponentially enhanced quantum sensing. Moreover, in the regime beyond linear response, the skin effect can also provide a clear advantage as compared to the local perturbation and the proposed protocol is robust in tuning the amplification factor.
DOI	10.1103/PhysRevApplied.17.014034
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[11688101] ; National Natural Science Foundation of China[61773370] ; National Natural Science Foundation of China[61833010] ; National Natural Science Foundation of China[61621003] ; Australian Research Council[DP190101566]
WOS研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:000753877500003
出版者	AMER PHYSICAL SOC
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/60066
专题	中国科学院数学与系统科学研究院
通讯作者	Qi, Bo
作者单位	1.Chinese Acad Sci, Acad Math & Syst Sci, Key Lab Syst & Control, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ New South Wales, Sch Engn & Informat Technol, Canberra, ACT 2600, Australia
推荐引用方式 GB/T 7714	Bao, Liying,Qi, Bo,Dong, Daoyi. Exponentially Enhanced Quantum Non-Hermitian Sensing via Optimized Coherent Drive[J]. PHYSICAL REVIEW APPLIED,2022,17(1):18.
APA	Bao, Liying,Qi, Bo,&Dong, Daoyi.(2022).Exponentially Enhanced Quantum Non-Hermitian Sensing via Optimized Coherent Drive.PHYSICAL REVIEW APPLIED,17(1),18.
MLA	Bao, Liying,et al."Exponentially Enhanced Quantum Non-Hermitian Sensing via Optimized Coherent Drive".PHYSICAL REVIEW APPLIED 17.1(2022):18.