On the robustness of acoustic black hole spectra

被引：20

作者：

Finazzi, S. ^{[1
,2
]}

Parentani, R. ^{[3
]}

机构：

[1] SISSA, Via Bonomea 265, I-34151 Trieste, Italy

[2] INFN, Sez Trieste, Trieste, Italy

[3] Univ Paris Sud 11, CNRS, Lab Phys Theor, UMR 8627, F-91405 Orsay, France

来源：

SPANISH RELATIVITY MEETING (ERE 2010): GRAVITY AS A CROSSROAD IN PHYSICS | 2011年 / 314卷

关键词：

RADIATION;

D O I：

10.1088/1742-6596/314/1/012030

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：4

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