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Quasi-particle creation by analogue black holes

AutorBarceló, Carlos ; Liberati, Stefano; Sonego, Sebastiano; Visser, Matt
Palabras claveAnalogue models
Acoustic spacetimes
Hawking radiation
Fecha de publicación12-abr-2006
EditorInstitute of Physics Publishing
CitaciónClass.Quant.Grav. 23 (2006) 5341-5366
arXiv:gr-qc/0604058v1
ResumenWe 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 dynamically changing flow either eventually generating an arbitrarily small sonic region v=c, but without any ergoregion, or even just asymptotically, in laboratory time, approaching a sonic regime with sufficient rapidity.
Descripción30 pages, 16 figures.
URIhttp://hdl.handle.net/10261/3440
ISSN1361-6382
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