Semiclassical Gravitational Effects in de Sitter Space at Finite Temperature

Details Semiclassical Gravitational Effects in de Sitter Space at Finite Temperature Semiclassical Gravitational Effects in de Sitter Space at Finite Temperature

1994-04-26

arxiv.org/abs/gr-qc/9404048v1

Class.Quant.Grav.12:393-402,1995

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

pag.14, 1 figure in poscript file available under request, Preprint DSF-8/94

Scientific paper

10.1088/0264-9381/12/2/008

In the framework of finite temperature conformal scalar field theory on de Sitter space-time the linearized Einstein equations for the renormalized stress tensor are exactly solved. In this theory quantum field fluctuations are concentrated near two spheres of the de Sitter radius, propagating as light wave fronts. Related cosmological aspects are shortly discussed. The analysis, performed for flat expanding universe, shows exponential damping of the back-reaction effects far from these spherical objects. The obtained solutions for the semiclassical Einstein equations in de Sitter background can be straightforwardly extended also to the anti-de Sitter geometry.

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