Quantum measurement of a solid-state qubit: A unified quantum master equation approach
文献类型：期刊论文
| 作者 | Li, XQ; Zhang, WK; Cui, P; Shao, JS; Ma, ZS; Yan, YJ |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2004-02-01 |
| 卷号 | 69期号:8 |
| ISSN号 | 1098-0121 |
| DOI | 10.1103/PhysRevB.69.085315 |
| 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. |
| 语种 | 英语 |
| WOS记录号 | WOS:000220185100065 |
| 出版者 | AMERICAN PHYSICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/81731]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Li, XQ |
| 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). |
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来源：化学研究所
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