Energy-momentum tensor for scalar fields coupled to the dilaton in two dimensions
Open Access
- 2 February 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 59 (6) , 064007
- https://doi.org/10.1103/physrevd.59.064007
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 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.Keywords
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