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Phys. Rev. D 76, 101502(R) (2007) [5 pages]

Quantum toy model for black-hole backreaction

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Clovis Maia1,2 and Ralf Schützhold1,*
1Institut für Theoretische Physik, Technische Universität Dresden, 01062 Dresden, Germany
2Instituto de Física Teórica, Universidade Estadual Paulista, 01405-900, São Paulo, SP, Brazil

Received 25 July 2007; published 9 November 2007

We propose a simple quantum field theoretical toy model for black-hole evaporation and study the backreaction of Hawking radiation onto the classical background. It turns out that the horizon is also “pushed back” in this situation (i.e., the interior region shrinks) though this backreaction is not caused by energy conservation but by momentum balance. The effective heat capacity and induced entropy variation can have both signs—depending on the parameters of the model.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.76.101502
DOI:
10.1103/PhysRevD.76.101502
PACS:
04.62.+v, 04.70.Dy

*schuetz@theory.phy.tu-dresden.de

 
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