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

被引：31
|
作者：
Lombardo, FC
Mazzitelli, FD
Russo, JG
机构：
[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, Argentina
[2] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Theoret Phys Grp, London SW7 2BZ, England
来源：
PHYSICAL REVIEW D | 1999年 / 59卷 / 06期
关键词：
D O I：
10.1103/PhysRevD.59.064007
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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. [S0556-2821(99)05104-8].
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页数：8
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