108 research outputs found
Analysis of inflationary cosmological models in gauge theories of gravitation
Inflationary homogeneous isotropic cosmological models filled by scalar
fields and ultrarelativistic matter are examined in the framework of gauge
theories of gravitation. By using quadratic scalar field potential numerical
analysis of flat, open and closed models is curried out. Properties of
cosmological models are investigated in dependence on indefinite parameter of
cosmological equations and initial conditions at a bounce. Fulfilled analysis
demonstrates regular character of all cosmological models.Comment: LaTeX2e, iopart class file, 12 pages, 19 figure
Regular accelerating Universe without dark energy
Homogeneous isotropic cosmological models with two torsion functions filled
with scalar fields and usual gravitating matter are built and investigated in
the framework of the Poincar\'e gauge theory of gravity. It is shown that by
certain restrictions on indefinite parameters of gravitational Lagrangian the
cosmological equations at asymptotics contain an effective cosmological
constant that can explain observable acceleration of cosmological expansion.
The behavior of inflationary cosmological solutions at extremely high energy
densities is analyzed, regular bouncing solutions are obtained. The role of the
space-time torsion provoking the acceleration of cosmological expansion is
discussed.Comment: 15 pages, 16 figures, iopart class file, some additions mad
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