4,382 research outputs found
Non-minimal coupling influence on the deviation from de Sitter cosmological expansion
We investigate the models of cosmological inflation in generalized
scalar-tensor gravity, which we consider as a source of deviation from de
Sitter dynamics in the case of GR. Within the framework of the proposed
approach, the exact equations of cosmological dynamics and parameters of
cosmological perturbations are obtained.Comment: 14 page
Stable vortex-antivortex molecules in mesoscopic superconducting triangles
A thermodynamically stable vortex-antivortex pattern has been revealed in
mesoscopic type I superconducting triangles, contrary to type II
superconductors where similar patterns are unstable. The stable
vortex-antivortex "molecule" appears due to the interplay between two factors:
a repulsive vortex-antivortex interaction in type I superconductors and the
vortex confinement in the triangle.Comment: 5 pages, 4 figures, E-mail addresses: [email protected],
[email protected], [email protected], [email protected]
The method of generating functions in exact scalar field cosmology
Exact solutions construction in scalar fields cosmology is of growing
interest. In this work we review the results which obtained with the help of
one of the most effective method. Namely, the method of generating functions
for exact solutions construction in the scalar field cosmology. We also
included into debate the superpotential method which may be considered as the
bridge to slow roll approximation equations. Basing on the review, we suggested
classification for the generating functions and found connection for all of
them with the superpotential.Comment: 15 parge
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