Quantum measurement of a solid-state qubit: A unified quantum master equation approach

	Quantum measurement of a solid-state qubit: A unified quantum master equation approach
	Li, XQ ; Zhang, WK ; Cui, P ; Shao, JS ; Ma, ZS ; Yan, YJ
刊名	physical review b
	2004-02-01
卷号	69 期号:8
英文摘要	quantum measurement of a solid-state qubit by a mesoscopic detector is of fundamental interest in quantum physics and an essential issue in quantum computing. in this work, by employing a unified quantum master equation approach constructed in our recent publications, we study the measurement-induced relaxation and dephasing of the coupled-quantum-dot states measured by a quantum-point contact. our treatment pays particular attention on the detailed-balance relation, which is a consequence of properly accounting for the energy exchange between the qubit and detector during the measurement process. as a result, our theory is applicable to measurement at arbitrary voltage and temperature. both numerical and analytical results for the qubit relaxation and dephasing are carried out, and important features are highlighted in concern with their possible relevance to future experiments.
WOS标题词	science & technology ; physical sciences
类目[WOS]	physics, condensed matter
研究领域[WOS]	physics
关键词[WOS]	dot ; detector
收录类别	SCI
语种	英语
WOS记录号	WOS:000220185100065
公开日期	2015-11-10
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/138444]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Inst Semicond, Natl Lab Superlattices & Microstruct, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing 100080, Peoples R China 3.Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China 4.Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China 5.Peking Univ, Dept Phys, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Li, XQ,Zhang, WK,Cui, P,et al. Quantum measurement of a solid-state qubit: A unified quantum master equation approach[J]. physical review b,2004,69(8).
APA	Li, XQ,Zhang, WK,Cui, P,Shao, JS,Ma, ZS,&Yan, YJ.(2004).Quantum measurement of a solid-state qubit: A unified quantum master equation approach.physical review b,69(8).
MLA	Li, XQ,et al."Quantum measurement of a solid-state qubit: A unified quantum master equation approach".physical review b 69.8(2004).