Results 41 to 50 of about 1,833,333 (166)
, 2004 I briefly review our current understanding of dark matter and dark energy. The first part of this paper focusses on issues pertaining to dark matter including observational evidence for its existence, current constraints and the `abundance of ...
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The Growth of Structure in Interacting Dark Energy Models [PDF]
, 2009 If dark energy interacts with dark matter, there is a change in the background evolution of the universe, since the dark matter density no longer evolves as a^{-3}. In addition, the non-gravitational interaction affects the growth of structure.
Caldera-Cabral, Gabriela +2 more
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Physics Letters B, 2011 Using the "teleparallel" equivalent of General Relativity as the gravitational sector, which is based on torsion instead of curvature, we add a canonical scalar field, allowing for a nonminimal coupling with gravity. Although the minimal case is completely equivalent to standard quintessence, the nonminimal scenario has a richer structure, exhibiting ...
Geng, Chao-Qiang +3 more
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The Revival of the Unified Dark Energy-Dark Matter Model ? [PDF]
, 2004 We consider the generalized Chaplygin gas (GCG) proposal for unification of dark energy and dark matter and show that it admits an unique decomposition into dark energy and dark matter components once phantom-like dark energy is excluded.
A. A. Sen +11 more
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Quantum Informational Dark Energy: Dark energy from forgetting
, 2007 We suggest that dark energy has a quantum informational origin. Landauer's principle associated with the erasure of quantum information at a cosmic horizon implies the non-zero vacuum energy having effective negative pressure.
Eva K. Lee +4 more
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Physical Review DRecent cosmological observations suggest that the dark energy equation of state may have changed in the latter stages of cosmic history. We introduce a quintessence scenario, termed bounded dark energy, capable of explaining this feature in a technically natural way. Our approach is motivated from a bottom-up perspective, based on the concept of mirage
Giulia Borghetto +3 more
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ON ANISOTROPIC DARK ENERGY [PDF]
Modern Physics Letters A, 2009 Since the discovery of accelerated expansion of the universe, it was necessary to introduce a new component of matter distribution called dark energy. The standard cosmological model considers isotropy of the pressure and assumes an equation of state p = ωρ, relating the pressure p and the energy density ρ.
Chan, R. +2 more
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, 2005 We describe the Dark Energy Survey (DES), a proposed optical-near infrared survey of 5000 sq. deg of the South Galactic Cap to ~24th magnitude in SDSS griz, that would use a new 3 sq.
The Dark Energy Survey Collaboration
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Dark Energy Scaling from Dark Matter to Acceleration [PDF]
, 2014 The dark sector of the Universe need not be completely separable into distinct dark matter and dark energy components. We consider a model of early dark energy in which the dark energy mimics a dark matter component in both evolution and perturbations at
Bielefeld, Jannis +2 more
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DARK ENERGY, WITH SIGNATURES [PDF]
International Journal of Modern Physics D, 2010 We propose a class of simple dark energy models which predict a late-time dark radiation component and a distinctive time-dependent equation of state w(z) for redshift z < 3. The dark energy field can be coupled strongly enough to standard model particles to be detected in colliders, and the model requires only modest additional particle content ...
Dutta, Sourish +2 more
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