论文标题
旋转体的波的扩增
Amplification of waves from a rotating body
论文作者
论文摘要
1971年，Zel'Dovich预测，从旋转的吸收缸反射反射的量子波动和经典波将获得能量并被放大。这一关键的概念步骤朝着理解黑洞可能会扩大量子波动的理解，由于对气缸旋转速率的挑战性实验要求，尚未在实验中进行验证，该速度必须大于传入的波频率。在这里，我们在实验上证明了这些条件可以对声波满足。我们表明，当磁盘旋转速率满足Zel'Dovich条件时，通过吸收的旋转磁盘通过吸收旋转磁盘通过吸收旋转磁盘传播具有轨道角动量的低频声模式。这些实验解决了基本物理学中的一个杰出问题，并对未来对旋转系统中能量提取的研究产生了影响。
In 1971 Zel'dovich predicted that quantum fluctuations and classical waves reflected from a rotating absorbing cylinder will gain energy and be amplified. This key conceptual step towards the understanding that black holes may also amplify quantum fluctuations, has not been verified experimentally due to the challenging experimental requirements on the cylinder rotation rate that must be larger than the incoming wave frequency. Here we experimentally demonstrate that these conditions can be satisfied with acoustic waves. We show that low-frequency acoustic modes with orbital angular momentum are transmitted through an absorbing rotating disk and amplified by up to 30% or more when the disk rotation rate satisfies the Zel'dovich condition. These experiments address an outstanding problem in fundamental physics and have implications for future research into the extraction of energy from rotating systems.
