Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1998-08-18
Phys.Rev. D59 (1999) 064007
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
18 pages, RevTex, no figures. Some changes have been added. To appear in Physical Review D
Scientific paper
10.1103/PhysRevD.59.064007
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.
Lombardo Fernando C.
Mazzitelli Francisco D.
Russo Jorge G.
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