标题： 旋转声学黑洞中的类Penrose过程 显示英文标题

标题： Analogue Penrose process in rotating acoustic black Hole

摘要： 类引力理论如今已成为研究那些以我们目前技术无法触及的引力现象的重要工具。 我们在此考虑了基于排水浴盆模型所描述的量子流体的旋转声学黑洞中的类Penrose过程。 由于这种声学时空的旋转性质，一个粒子（即在量子流体上行进的声子）将会经历著名的拖曳效应。 通过定义这种声学黑洞的有效Komar质量和角动量，我们发现可以从其中提取能量。 同时，我们展示了黑洞的角动量和质量会减少，这与Penrose效应完全类似。 显示英文摘要

摘要： Analogue gravity stands today as an important tool for the investigation of gravitational phenomena that would be otherwise out of reach considering our technology. We consider here the analogue Penrose process in a rotating acoustic black hole based on a quantum fluid described by the draining bathtub model. Because of the rotating nature of this acoustic spacetime, a particle, that is a phonon travelling on the quantum fluid, will experience the well known frame dragging effect. By defining the effective Komar mass and angular momentum of this acoustic black hole, we found that energy can be extracted from it. At the same time, we show that the black hole angular momentum and mass are reduced, in complete analogy with the Penrose effect.