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- W2000940364 abstract "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." @default.
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- W2000940364 date "2004-02-20" @default.
- W2000940364 modified "2023-10-16" @default.
- W2000940364 title "Quantum measurement of a solid-state qubit: A unified quantum master equation approach" @default.
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- W2000940364 doi "https://doi.org/10.1103/physrevb.69.085315" @default.
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