On the robustness of acoustic black hole spectra

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...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 314; no. 1; pp. 012030 - 4
Main Authors Finazzi, S, Parentani, R
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2011
IOP Science
Subjects
Acoustics
Black holes
Black holes (astronomy)
Bose-Einstein condensates
Channels
Condensed Matter
Dispersions
Emittance
General Relativity and Quantum Cosmology
Horizon
Other
Physics
Robustness
Spectra
Spectral emittance
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Summary: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.
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ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/314/1/012030