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Unification of dark energy and dark matter [PDF]
Physics Letters B, 2006 10 pages, no figure, references and comments are added, version accepted for publication by Physics Letters ...
Takahashi, Fuminobu, Yanagida, T. T.
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Barrow entropic dark energy: A member of generalized holographic dark energy family
Physics Letters B, 2022 The holographic cut-off, in the formalism of generalized holographic dark energy (HDE), is generalized to depend on LIR=LIR(Lp,L˙p,L¨p,⋯,Lf,L˙f,⋯,a), where Lp and Lf are the particle horizon and future horizon respectively, and a is the scale factor of ...
Shin'ichi Nojiri +2 more
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International Journal of Modern Physics A, 2010 In this paper we review a part of the approaches that have been considered to explain the extraordinary discovery of the late time acceleration of the Universe. We discuss the arguments that have led physicists and astronomers to accept dark energy as the current preferable candidate to explain the acceleration.
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Dark energy without dark energy [PDF]
AIP Conference Proceedings, 2006 4 pages, 1 figure, to appear in AIP proceedings of "Dark side of the Universe"
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From Dark Energy & Dark Matter to Dark Metric [PDF]
Foundations of Physics, 2009 It is nowadays clear that General Relativity cannot be the definitive theory of Gravitation due to several shortcomings that come out both from theoretical and experimental viewpoints. At large scales (astrophysical and cosmological) the attempts to match it with the latest observational data lead to invoke Dark Energy and Dark Matter as the bulk ...
CAPOZZIELLO, SALVATORE +3 more
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DARK ENERGY, DARK MATTER AND GRAVITY [PDF]
International Journal of Modern Physics D, 2007 We discuss the motivation for high accuracy relativistic gravitational experiments in the solar system and complementary cosmological tests. We focus our attention on the issue of distinguishing a generic scalar theory of gravity as the underlying physical theory from the usual general-relativistic picture, where one expects the presence of ...
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Dark Energy from Cosmological Energy Conservation
Advances in Astronomy, 2023 The value of the gravitational wave energy density is unknown. Current progress in gravitational wave detection suggests that the energy density of the stochastic gravitational wave background (SGWB) will be estimated in the next decades. A derivation of
Manuel Uruena Palomo
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Dark group: dark energy and dark matter [PDF]
Physics Letters B, 2004 We study the possibility that a dark group, a gauge group with particles interacting with the standard model particles only via gravity, is responsible for containing the dark energy and dark matter required by present day observations. We show that it is indeed possible and we determine the constrains for the dark group.
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Physics Letters B, 2003 Velocity-dependent interactions in a fundamental-string dominated universe lead quite naturally, with reasonable assumptions on initial conditions, to an accelerating expanding universe without assuming the existence of a cosmological constant. This result also holds generically for a universe dominated by moving extremal black holes, owing to a ...
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Journal of Cosmology and Astroparticle Physics, 2010 We introduce a novel class of field theories where energy always flows along timelike geodesics, mimicking in that respect dust, yet which possess non-zero pressure. This theory comprises two scalar fields, one of which is a Lagrange multiplier enforcing a constraint between the other's field value and derivative.
Lim, Eugene A. +2 more
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