Quasi-particle creation by analogue black holes
Quasi-particle creation by analogue black holes
复制标题
模拟黑洞产生准粒子
DOI：
10.1088/0264-9381/23/17/014
复制
发表时间：
2006
影响因子：
3.5
通讯作者：
Matt Visser
中科院分区：
文献类型：
--
作者：
C. Barceló;S. Liberati;S. Sonego;Matt Visser
我们讨论的问题，准粒子生产的“模拟黑洞”，特别注意在实验室中再现霍金辐射的可能性。通过构造简单的几何声学模型，我们得到了一个有点意想不到的结果：我们表明，为了获得准粒子的稳态和普朗克发射，没有必要在声学时空中创建一个能区（对应于流中的超音速状态）。建立一个合适的动态变化的流就足够了。例如，一个最终产生一个任意小的音速区v = c，但没有任何能区的流动，或者甚至一个在实验室时间内渐近地接近音速区的流动。
We discuss the issue of quasi-particle production by ‘analogue black holes’ with particular attention to the possibility of reproducing Hawking radiation in a laboratory. By constructing simple geometric acoustic models, we obtain a somewhat unexpected result: we show that in order to obtain a stationary and Planckian emission of quasi-particles, it is not necessary to create an ergoregion in the acoustic spacetime (corresponding to a supersonic regime in the flow). It is sufficient to set up a suitable dynamically changing flow. For instance, either a flow that eventually generates an arbitrarily small sonic region v = c, but without any ergoregion, or even a flow that just asymptotically, in laboratory time, approaches a sonic regime with sufficient rapidity.