论文标题
声学超高的动态景观
Dynamics Landscape for Acoustic Superradiance
论文作者
论文摘要
我们分析了与旋转的流体饱和多孔材料相互作用的声学涡流束的行为。鉴定出表现出不同动力学特征的参数空间区域，重点是与旋转超级表征相关的特征。我们讨论了两个最近的提案之间的相似性和差异，以观察旋转，空气饱和的吸收器的声学超赞。最后，将宏观声学散射的理论预测与第一个出生近似值的预测进行了比较，该预测是通过在微观水平上进行流体和多孔材料之间的相互作用而获得的。
We analyze the behaviour of acoustic vortex beams interacting with rotating, fluid-saturated porous materials. Regions of the parameter space that exhibit distinct dynamical features are identified, with a focus on features that are relevant to the characterization of rotational superradiance. We discuss the similarities and differences between two recent proposals to observe acoustic superradiance with rotating, air-saturated sound absorbers. Finally, theoretical predictions for macroscopic acoustic scattering, obtained by averaging over interactions between the fluid and the porous material at the microscopic level, are compared with predictions of the first-Born approximation.
