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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.
Relativitat general (Física)
General relativity (Physics)
(c) The American Physical Society, 1999
The American Physical Society

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