منابع مشابه
Coupled DM Heating in SCDEW Cosmologies
Strongly-Coupled Dark Energy plus Warm dark matter (SCDEW) cosmologies admit the stationary presence of ∼1% of coupled-DM and DE, since inflationary reheating. Coupled-DM fluctuations therefore grow up to non-linearity even in the early radiative expansion. Such early non-linear stages are modelized here through the evolution of a top-hat density enhancement, reaching an early virial balance wh...
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We analyze numerically a two-dimensional λφ theory showing that in the limit of a strong coupling λ → ∞ just the homogeneous solutions for time evolution are relevant in agreement with the duality principle in perturbation theory as presented in [M.Frasca, Phys. Rev. A 58, 3439 (1998)], being negligible the contribution of the spatial varying parts of the dynamical equations. A consequence is t...
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Scalar elds coupled to gravity via R 2 in arbitrary Friedmann-RobertsonWalker backgrounds can be represented by an e ective at space eld theory. We derive an expression for the scalar energy density where the e ective scalar mass becomes an explicit function of and the scale factor. The scalar quartic self-coupling gets shifted and can vanish for a particular choice of . Gravitationally induced...
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ژورنال
عنوان ژورنال: Nuclear and Particle Physics Proceedings
سال: 2015
ISSN: 2405-6014
DOI: 10.1016/j.nuclphysbps.2015.06.017