On the robustness of acoustic black hole spectra
On the robustness of acoustic black hole spectra
复制标题
声学黑洞谱的鲁棒性
DOI：
10.1088/1742-6596/314/1/012030
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
R. Parentani
中科院分区：
文献类型：
--
作者：
Stefano Finazzi;R. Parentani
我们通过考虑一系列变为亚音速或超音速（即当地平线消失时）的稳态流来研究声学黑洞发出的频谱的鲁棒性。我们研究玻色-爱因斯坦凝聚体的超光速博戈柳波夫色散。我们发现，在地平线消失之前，光谱仍然保持着明显的普朗克特征。当流动无处不在的超音速时，新的配对创建通道就会打开。这将是即将开展的工作的主题。
We study the robustness of the spectrum emitted by an acoustic black hole by considering series of stationary flows that become either subsonic or supersonic, i.e. when the horizon disappears. We work with the superluminal Bogoliubov dispersion of Bose–Einstein condensates. We find that the spectrum remains remarkably Planckian until the horizon disappears. When the flow is everywhere supersonic, new pair creation channels open. This will be the subject of a forthcoming work.