双端口波混沌散射系统中短光轨迹效应的实验研究
Experimental Examination of the Effect of Short Ray Trajectories in Two-port Wave-Chaotic Scattering Systems
摘要：
除了随机矩阵理论之外，预测实际的波混沌散射系统的统计数据还需要引入系统特定的信息。本文从实验上研究了系统特有行为的一个方面，即在向外部散射通道开放的波动混沌系统中短射线轨迹的影响。特别是，我们考虑通过通道（端口）进入散射区域并随后通过通道（端口）退出的有限长度的射线轨迹。我们表明，一个适当的平均值的阻抗可以计算从这些轨迹，这可以提高描述的散射系统的统计特性的能力。我们说明和测试这些点，通过一个现实的两端口微波散射台球实验。
英文摘要：
Predicting the statistics of realistic wave-chaotic scattering systems requires, in addition to random matrix theory, introduction of system-specific information. This paper investigates experimentally one aspect of system-specific behavior, namely the effects of short ray trajectories in wave-chaotic systems open to outside scattering channels. In particular, we consider ray trajectories of limited length that enter a scattering region through a channel (port) and subsequently exit through a channel (port). We show that a suitably averaged value of the impedance can be computed from these trajectories and that this can improve the ability to describe the statistical properties of the scattering systems. We illustrate and test these points through experiments on a realistic two-port microwave scattering billiard.
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