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Energy-momentum tensor for scalar fields coupled to the dilaton in two dimensions
Lombardo, Fernando C.; Mazzitelli, Francisco D.; Russo, J. G. (Jorge Guillermo)
Universitat de Barcelona
We clarify some issues related to the evaluation of the mean value of the energy-momentum tensor for quantum scalar fields coupled to the dilaton field in two-dimensional gravity. Because of this coupling, the energy-momentum tensor for matter is not conserved and therefore it is not determined by the trace anomaly. We discuss different approximations for the calculation of the energy-momentum tensor and show how to obtain the correct amount of Hawking radiation. We also compute cosmological particle creation and quantum corrections to the Newtonian potential.
2010-05-11
Relativitat general (Física)
Gravitació
General relativity (Physics)
Gravitation
(c) The American Physical Society, 1999
Article
The American Physical Society
         

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