ICCAS OpenIR
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
2004-02-01
Source PublicationPHYSICAL REVIEW B
ISSN1098-0121
Volume69Issue:8
AbstractQuantum 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.
DOI10.1103/PhysRevB.69.085315
Indexed BySCI
Language英语
WOS IDWOS:000220185100065
PublisherAMERICAN PHYSICAL SOC
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/81732
Collection中国科学院化学研究所
Corresponding AuthorLi, XQ
Affiliation1.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
Recommended Citation
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).
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