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Energy-momentum tensor for scalar fields coupled to the dilaton in two dimensions

Fernando C. Lombardo·Francisco D. Mazzitelli·Jorge G. Russo
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Abstract

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 the 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.

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Fernando C. Lombardo, Francisco D. Mazzitelli, Jorge G. Russo. 1998-12-01. Energy-momentum tensor for scalar fields coupled to the dilaton in two dimensions. https://doi.org/10.1103/physrevd.59.064007

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