Coherent Forward Scattering Peak Induced by Anderson Localization
Coherent Forward Scattering Peak Induced by Anderson Localization
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DOI：
10.1103/physrevlett.109.190601
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发表时间：
2012-11-07
影响因子：
8.6
通讯作者：
Miniatura, C.
中科院分区：
文献类型：
--
作者：
Karpiuk, T.;Cherroret, N.;Miniatura, C.
数值模拟表明，在安德森局域化开始时，在随机势场中发射的相干波包的动量分布在正向方向上呈现出一个新的干涉峰，它与相干后向散射峰互补.这种现象的最大交叉图方面的解释预测，信号出现在本地化时间和增长的海森堡时间与本地化体积的规模。相干后向散射和前向散射共同为安德森局域化的发生提供了证据。
Numerical simulations show that, at the onset of Anderson localization, the momentum distribution of a coherent wave packet launched inside a random potential exhibits, in the forward direction, a novel interference peak that complements the coherent backscattering peak. An explanation of this phenomenon in terms of maximally crossed diagrams predicts that the signal emerges around the localization time and grows on the scale of the Heisenberg time associated with the localization volume. Together, coherent back and forward scattering provide evidence for the occurrence of Anderson localization.