TITLE:
An Exact Scalar Field Inflationary Cosmological Model Which Solves Cosmological Constant Problem, Dark Matter Problem and Other Problems of Inflationary Cosmology
AUTHORS:
Debasis Biswas
KEYWORDS:
Inflationary Cosmology; Cosmological Constant; Dark Matter
JOURNAL NAME:
Journal of Modern Physics,
Vol.4 No.8A,
August
27,
2013
ABSTRACT: An exact scalar field cosmological model is constructed from the
exact solution of the field equations. The solutions are exact and no
approximation like slow roll is used. The model gives inflation, solves horizon
and flatness problems. The model also gives a satisfactory estimate of present
vacuum energy density as well as vacuum energy density at Planck epoch and
solves cosmological constant problem of 120 orders of magnitude discrepancy of
vacuum energy density. Further, this model predicts existence of dark
matter/energy and gives an extremely accurate estimate of present energy
density of dark matter and energy. Along with explanations of graceful exit, radiation
era, matter domination, this model also indicates the reason for present
accelerated state of the universe. In this work a method is shown following
which one can construct an infinite number of exact scalar field inflationary
cosmological models.