Renormalized Stress Tensor for trans-Planckian Cosmology

Details Renormalized Stress Tensor for trans-Planckian Cosmology Renormalized Stress Tensor for trans-Planckian Cosmology

2005-11-09

arxiv.org/abs/gr-qc/0511046v2

Phys.Rev. D72 (2005) 124013

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages. Minor changes; version published in Physical Review D

Scientific paper

10.1103/PhysRevD.72.124013

Finite expressions for the mean value of the stress tensor corresponding to a scalar field with a generalized dispersion relation in a Friedman--Robertson--Walker universe are obtained using adiabatic renormalization. Formally divergent integrals are evaluated by means of dimensional regularization. The renormalization procedure is shown to be equivalent to a redefinition of the cosmological constant and the Newton constant in the semiclassical Einstein equations.

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