The effective evolution of an inhomogeneous universe model in any theory of gravitation
may be described in terms of spatially averaged variables. In Einstein's theory, restricting …

Current observational bounds on dark energy depend on our assumptions about the
curvature of the universe. We present a simple and efficient method for incorporating …

Interacting tachyon dark energy in non-flat universe - ScienceDirect Skip to main contentSkip
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We consider a massless, minimally coupled scalar with a quartic self-interaction which is
released in Bunch-Davies vacuum in the locally de Sitter background of an inflating …

In order to quantitatively test the ability of averaged inhomogeneous cosmologies to
correctly describe observations of the large-scale properties of the Universe, we introduce a …

The paper studies a new type of dark energy, a scalar field with positive or negative kinetic
energy, generically coupled to a term which is composed by specific contractions of the …

Motivated by the recent work of Elizalde et al.[E. Elizalde, S. Nojiri, SD Odintsov, D. Saez–
Gomez, V. Faraoni, Phys. Rev. D 77 (2008) 106005], we generalize their work to the non-flat …

Current observational data indicate that dark energy (DE) is a cosmological constant without
considering its conclusiveness evidence. Considering the dynamic nature of Λ individually …

Dynamic dark-energy (DDE) models are often designed to solve the cosmic coincidence
(why, just now, is the dark-energy density ρ de the same order of magnitude as the matter …

In this article, we study the tensor mode equation of perturbation in the presence of
nonzero− Λ as dark energy, the dynamic nature of which depends on the Hubble parameter …