论文标题
在三维各向异性介质中的安德森定位过渡时抑制转运各向异性
Suppression of transport anisotropy at the Anderson localization transition in three-dimensional anisotropic media
论文作者
论文摘要
我们研究经典波通过三维（3D）各向异性媒体的运输，接近安德森本地化过渡。时间，频率和位置分辨的超声测量在各向异性平板形的中轴样品上进行，以探测多重散射晕的动力学和各向异性，因此研究障碍对波传输性质及其各向异性的影响。这些实验使我们能够解决关于运输各向异性是否受到导致安德森本地化的干扰效应的影响的相互矛盾的理论预测。我们发现，随着迁移率边缘的接近，转运各向异性被显着降低 - 一种类似于最近预测的行为，即无限各向异性3D介质的物质波。
We study the transport of classical waves through three-dimensional (3D) anisotropic media close to the Anderson localization transition. Time-, frequency-, and position-resolved ultrasonic measurements are performed on anisotropic slab-shaped mesoglass samples to probe the dynamics and the anisotropy of the multiple scattering halo, and hence to investigate the influence of disorder on the nature of wave transport and its anisotropy. These experiments allow us to address conflicting theoretical predictions that have been made about whether or not the transport anisotropy is affected by the interference effects that lead to Anderson localization. We find that the transport anisotropy is significantly reduced as the mobility edge is approached---a behavior similar to the one predicted recently for matter waves in infinite anisotropic 3D media.
