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arXiv quant-ph/9806050quant-phcond-mat
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相干输运的密度矩阵方法及其测量问题

Density-matrix approach to coherent transport and the measurement problem

S. A. Gurvitz

摘要:

应用描述介观系统相干输运的布洛赫型方程研究了连续测量过程。探测器和被测系统都用量子力学方法描述。结果表明,整个系统的薛定谔演化不能容纳与测量崩溃。后者导致了可以通过实验检测到的量子跃迁。

英文摘要:

Bloch-type equations for description of coherent transport in mesoscopic systems are applied for a study of the continuous measurement process. Both the detector and the measured system are described quantum mechanically. It is shown that the Schrödinger evolution of the entire system cannot be accommodated with the measurement collapse. The latter leads to quantum jumps which can be experimentally detected.

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