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arXiv quant-ph/0604069quant-ph
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二维晶格表面激发的生存概率:非马尔可夫效应和生存崩溃

Survival probability of surface excitations in a 2d lattice: non-Markovian effects and Survival Collapse

E. Rufeil Fiori, H. M. Pastawski

摘要:

分析了二维模型中表面激发的演化。I)它以二次方式开始直到扩展时间t_{S}。它遵循由自洽的费米黄金法则支配的指数行为。III)在较长的时间内,指数被描述由量子扩散控制的返回过程的逆幂律所超越。在这个最后的转换时间t_{R},生存崩溃成为可能,使生存概率下降几个数量级。我们确定这种强烈的相消干涉在时域中的反共振。

英文摘要:

The evolution of a surface excitation in a two dimentional model is analyzed. I) It starts quadratically up to a spreading time t_{S}. II) It follows an exponential behavior governed by a self-consistent Fermi Golden Rule. III) At longer times, the exponential is overrun by an inverse power law describing return processes governed by quantum diffusion. At this last transition time t_{R} a survival collapse becomes possible, bringing the survival probability down by several orders of magnitude. We identify this strongly destructive interference as an antiresonance in the time domain.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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