Semiclassical cosmology with a scalar field

Details Semiclassical cosmology with a scalar field Semiclassical cosmology with a scalar field

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrvd..35.2993s&link_type=abstract

Physical Review D (Particles and Fields), Volume 35, Issue 10, 15 May 1987, pp.2993-3001

Mathematics

Logic

2

Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

A self-consistent scheme for studying the semiclassical limit of a quantized scalar field in a classical Robertson-Walker metric is developed. The scalar field is chosen to be in a Gaussian state. The classical and semiclassical geometries are contrasted; and it is shown that nontrivial solutions exist for the space-time geometry which are driven by the vacuum fluctuations of the scalar field. We also discuss the stability of de Sitter space to quantum fluctuations, if the cosmological constant is larger than a critical value.

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