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

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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.

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Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevD.59.064007

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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