Intensity Fluctuations of Waves in Random Media: What Is the Semiclassical Limit?
Intensity Fluctuations of Waves in Random Media: What Is the Semiclassical Limit?
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DOI：
10.1103/physrevlett.111.013901
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发表时间：
2013-07-02
影响因子：
8.6
通讯作者：
Geisel, Theo
中科院分区：
文献类型：
--
作者：
Metzger, Jakob J.;Fleischmann, Ragnar;Geisel, Theo
通过弱随机介质传播的波被其相应的射线动力学强烈影响，特别是在形成线性畸形波。射线强度分布，其中，e。例如，在一个实施例中，然而，如何量化反常波的概率是未知的，并且缺乏如何在波动力学的适当半经典极限中接近它的理论。我们表明，这个限制是不是通常的小波长的限制，但退相干。我们的理论，它可以描述的强度分布的任意程度的相干性是相关的广泛的物理系统，因为退相干是无处不在的真实的系统。
Waves traveling through weakly random media are known to be strongly affected by their corresponding ray dynamics, in particular in forming linear freak waves. The ray intensity distribution, which, e. g., quantifies the probability of freak waves is unknown, however, and a theory of how it is approached in an appropriate semiclassical limit of wave mechanics is lacking. We show that this limit is not the usual limit of small wavelengths, but that of decoherence. Our theory, which can describe the intensity distribution for an arbitrary degree of coherence is relevant to a wide range of physical systems, as decoherence is omnipresent in real systems.