Fundamental limits for reciprocal and nonreciprocal non-Hermitian quantum sensing

doi:10.1103/PhysRevA.103.042418

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	Fundamental limits for reciprocal and nonreciprocal non-Hermitian quantum sensing
	Bao, Liying 1,2; Qi, Bo 1,2; Dong, Daoyi 3; Nori, Franco 4,5
	2021-04-20
发表期刊	PHYSICAL REVIEW A
ISSN	2469-9926
卷号	103 期号:4 页码:13
摘要	Non-Hermitian dynamics has been widely studied to enhance the precision of quantum sensing; and nonreciprocity can be a powerful resource for non-Hermitian quantum sensing, as nonreciprocity allows to arbitrarily exceed the fundamental bound on the measurement rate of any reciprocal sensors. Here we establish fundamental limits on signal-to-noise ratio for reciprocal and nonreciprocal non-Hermitian quantum sensing. In particular, for two-mode linear systems with two coherent drives, an approximately attainable uniform bound on the best possiblemeasurement rate per photon is derived for both reciprocal and nonreciprocal sensors. This bound is only related to the coupling coefficients and, in principle, can be made arbitrarily large. Our results thus demonstrate that a conventional reciprocal sensor with two drives can simulate any nonreciprocal sensor. This work also demonstrates a clear signature on how the excitation signals affect the signal-to-noise ratio in non-Hermitian quantum sensing.
DOI	10.1103/PhysRevA.103.042418
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[61773370] ; National Natural Science Foundation of China[11688101] ; National Natural Science Foundation of China[61833010] ; Australian Research Councils Discovery Projects funding scheme[DP190101566] ; Alexander von Humboldt Foundation of Germany ; US Office of Naval Research Global[N62909-19-1-2129] ; NTT Research, Japan Science and Technology Agency (JST) (via the Q-LEAP program, Moonshot RD)[JPMJMS2061] ; NTT Research, Japan Science and Technology Agency (JST) (via the CREST)[JP-MJCR1676] ; Japan Society for the Promotion of Science (JSPS) (via the KAKENHI)[JP20H00134] ; Japan Society for the Promotion of Science (JSPS) (via the JSPS-RFBR)[JPJSBP120194828] ; Army Research Office (ARO)[W911NF-18-1-0358] ; Asian Office of Aerospace Research and Development (AOARD)[FA2386-20-1-4069] ; Foundational Questions Institute Fund (FQXi)[FQXi-IAF19-06]
WOS研究方向	Optics ; Physics
WOS类目	Optics ; Physics, Atomic, Molecular & Chemical
WOS记录号	WOS:000646151400002
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/58615
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 4.RIKEN, Theoret Quantum Phys Lab, Saitama 3510198, Japan 5.Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
推荐引用方式 GB/T 7714	Bao, Liying,Qi, Bo,Dong, Daoyi,et al. Fundamental limits for reciprocal and nonreciprocal non-Hermitian quantum sensing[J]. PHYSICAL REVIEW A,2021,103(4):13.
APA	Bao, Liying,Qi, Bo,Dong, Daoyi,&Nori, Franco.(2021).Fundamental limits for reciprocal and nonreciprocal non-Hermitian quantum sensing.PHYSICAL REVIEW A,103(4),13.
MLA	Bao, Liying,et al."Fundamental limits for reciprocal and nonreciprocal non-Hermitian quantum sensing".PHYSICAL REVIEW A 103.4(2021):13.