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题名: Quantum measurement of an electron in a disordered potential: Delocalization versus measurement voltages
作者: Hu XN;  Li XQ
发表日期: 2006
摘要: Quantum point contact (QPC), one of the typical mesoscopic transport devices, has been suggested to be an efficient detector for quantum measurement. In the context of two-state charge qubit, our previous studies showed that the QPC's measurement back-action cannot be described by the conventional Lindblad quantum master equation. In this work, we study the measurement problem of a multistate system, say, an electron in disordered potential, subject to the quantum measurement of the mesoscopic detector QPC. The effect of measurement back-action and the detector's readout current are analyzed, where particular attention is focused on some new features and the underlying physics associated with the measurement-induced delocalization versus the measurement voltages.
KOS主题词: Diffusion;  detector
刊名: PHYSICAL REVIEW B
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Hu XN; Li XQ .Quantum measurement of an electron in a disordered potential: Delocalization versus measurement voltages ,PHYSICAL REVIEW B,2006,73(3):Art.No.035320
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