串、并联电阻失相的两种唯象模型的比较研究
A comparative study of two phenomenological models of dephasing in series and parallel resistors
摘要：
我们比较了两个现象学模型的失相，最近在使用。我们表明，随机吸收模型导致合理的退相串联（双势垒）和并联（环）量子电阻的存在和不存在的磁通量。对于足够大的失相，它导致欧姆定律。另一方面，基于随机相位的统计模型使用传播子拾取的高斯随机相位的平均，导致几个不一致。这可以归因于该模型的失败，以退相的互补电子波之间的干扰，每个以下的时间反转路径的其他。
英文摘要：
We compare two phenomenological models of dephasing that are in use recently. We show that the stochastic absorption model leads to reasonable dephasing in series (double barrier) and parallel (ring) quantum resistors in presence and absence of magnetic flux. For large enough dephasing it leads to Ohm's law. On the other hand a random phase based statistical model that uses averaging over Gaussian random-phases, picked up by the propagators, leads to several inconsistencies. This can be attributed to the failure of this model to dephase interference between complementary electron waves each following time-reversed path of the other.
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