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摘要翻译：
相干后向散射是由于互易路径的构造性干扰，导致源附近多散射场强度的增强。为了观察这种增强，传统地将接收器阵列放置在靠近源的地方。我们在这里的做法是不同的。在第一个实验中，我们利用漫射场的时间相关性恢复了源阵列和远距离接收机中的相干后向散射效应(CBE)。增强锥具有优异的空间分辨率。在第二个实验中，利用相同超声频率下的热声子关联，在没有任何主动源的情况下，研究了增强因子的动力学。
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英文标题：
《Coherent backscattering of ultrasound without a source》
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作者：
Eric Larose (TA&M, LGIT), Oleg I. Lobkis (TA&M), Richard L. Weaver
(TA&M)
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最新提交年份：
2007
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分类信息：
一级分类：Physics 物理学
二级分类：Other Condensed Matter 其他凝聚态物质
分类描述：Work in condensed matter that does not fit into the other cond-mat classifications
在不适合其他cond-mat分类的凝聚态物质中工作
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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一级分类：Physics 物理学
二级分类：Classical Physics 经典物理学
分类描述：Newtonian and relativistic dynamics; many particle systems; planetary motions; chaos in classical dynamics. Maxwell's equations and dynamics of charged systems and electromagnetic forces in materials. Vibrating systems such as membranes and cantilevers; optomechanics. Classical waves, including acoustics and elasticity; physics of music and musical instruments. Classical thermodynamics and heat flow problems.
牛顿和相对论动力学；许多粒子系统；行星运动；经典动力学中的混沌。材料中带电系统和电磁力的麦克斯韦方程组和动力学。振动系统，如薄膜和悬臂；光学力学。经典波，包括声学和弹性；音乐和乐器物理学。经典热力学和热流问题。
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一级分类：Physics 物理学
二级分类：Geophysics 地球物理学
分类描述：Atmospheric physics. Biogeosciences. Computational geophysics. Geographic location. Geoinformatics. Geophysical techniques. Hydrospheric geophysics. Magnetospheric physics. Mathematical geophysics. Planetology. Solar system. Solid earth geophysics. Space plasma physics. Mineral physics. High pressure physics.
大气物理学。生物地质学。计算地球物理学。地理位置。地理信息学。地球物理技术。水层地球物理学。磁层物理学。数学地球物理学。行星学。太阳系。固体地球地球物理学。空间等离子体物理。矿物物理学。高压物理。
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英文摘要：
Coherent backscattering is due to constructive interferences of reciprocal paths and leads to an enhancement of the intensity of a multiply scattered field near its source. To observe this enhancement an array of receivers is conventionally placed close to the source. Our approach here is different. In a first experiment, we recover the coherent backscattering effect (CBE) within an array of sources and a distant receiver using time correlation of diffuse fields. The enhancement cone has an excellent spatial resolution. The dynamics of the enhancement factor is studied in a second experiment using correlation of thermal phonons at the same ultrasonic frequencies, without any active source.
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PDF链接：
https://arxiv.org/pdf/709.3003
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