Analytic approximation and an improved method for computing the stress-energy of quantized scalar fields in Robertson-Walker spacetimes

Details Analytic approximation and an improved method for computing the stress-energy of quantized scalar fields in Robertson-Walker spacetimes Analytic approximation and an improved method for computing the stress-energy of quantized scalar fields in Robertson-Walker spacetimes

1999-06-15

arxiv.org/abs/gr-qc/9906055v1

Phys.Rev. D61 (2000) 024003

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

RevTeX, 8 pages, no figures

Scientific paper

10.1103/PhysRevD.61.024003

An improved method is given for the computation of the stress-energy tensor of a quantized scalar field using adiabatic regularization. The method works for fields with arbitrary mass and curvature coupling in Robertson-Walker spacetimes and is particularly useful for spacetimes with compact spatial sections. For massless fields it yields an analytic approximation for the stress-energy tensor that is similar in nature to those obtained previously for massless fields in static spacetimes.

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