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arXiv quant-ph/0104132quant-ph
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隧穿和退相干的时间演化:可解模型

Time Evolution of tunneling and decoherence: soluble model

A. N. Salgueiro, A. F. de R. de Toledo Piza, J. G. Peixoto de Faria

摘要:

退相干效应与阻尼的隧穿二能级系统示出占主导地位的隧穿概率在短时间内在强耦合制度的背景下的可溶性模型。实现了隧穿率在耗散部分和酉部分的一般分解。主方程的处理不能正确地描述模型系统时,涉及一个以上的弛豫时间。

英文摘要:

Decoherence effects associated to the damping of a tunneling two-level system are shown to dominate the tunneling probability at short times in strong coupling regimes in the context of a soluble model. A general decomposition of tunneling rates in dissipative and unitary parts is implemented. Master equation treatments fail to describe the model system correctly when more than a single relaxation time is involved.

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