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APS » Journals » Phys. Rev. Lett. » Volume 94 » Issue 16
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Phys. Rev. Lett. 94, 161302 (2005) [4 pages]

Backreaction in Acoustic Black Holes

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Roberto Balbinot and Serena Fagnocchi*
Dipartimento di Fisica dell’Università di Bologna and INFN sezione di Bologna, Via Irnerio 46, 40126 Bologna, Italy

Alessandro Fabbri†
Departamento de Fisica Teorica, Facultad de Fisica, Universidad de Valencia, Burjassot-46100, Valencia, Spain

Giovanni P. Procopio‡
DAMTP, Centre for Mathematical Sciences, University of Cambridge Wilberforce road, Cambridge CB3 OWA, United Kingdom

Received 24 May 2004; revised 29 November 2004; published 29 April 2005

The backreaction equations for the linearized quantum fluctuations in an acoustic black hole are given. The solution near the horizon, obtained within a dimensional reduction, indicates that acoustic black holes, unlike Schwarzschild ones, get cooler as they radiate phonons. They show remarkable analogies with near-extremal Reissner-Nordström black holes.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.161302
DOI:
10.1103/PhysRevLett.94.161302
PACS:
04.70.Dy, 04.62.+v, 47.40.Ki

*Electronic address: balbinot@bo.infn.it

Email address: fagnocchi@bo.infn.it

†Electronic address: fabbria@bo.infn.it

‡Electronic address: gpp27@cam.ac.uk

 
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