4
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Holographic dark energy with varying gravitational constant

      Preprint

      , ,

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          We investigate the holographic dark energy scenario with a varying gravitational constant, in flat and non-flat background geometry. We extract the exact differential equations determining the evolution of the dark energy density-parameter, which include \(G\)-variation correction terms. Performing a low-redshift expansion of the dark energy equation of state, we provide the involved parameters as functions of the current density parameters, of the holographic dark energy constant and of the \(G\)-variation.

          Related collections

          Most cited references 9

          • Record: found
          • Abstract: found
          • Article: found
          Is Open Access

          Effective Field Theory, Black Holes, and the Cosmological Constant

           ,  ,   (2009)
          Bekenstein has proposed the bound S < pi M_P^2 L^2 on the total entropy S in a volume L^3. This non-extensive scaling suggests that quantum field theory breaks down in large volume. To reconcile this breakdown with the success of local quantum field theory in describing observed particle phenomenology, we propose a relationship between UV and IR cutoffs such that an effective field theory should be a good description of Nature. We discuss implications for the cosmological constant problem. We find a limitation on the accuracy which can be achieved by conventional effective field theory: for example, the minimal correction to (g-2) for the electron from the constrained IR and UV cutoffs is larger than the contribution from the top quark.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: found
            Is Open Access

            The end of unified dark matter?

            Despite the interest in dark matter and dark energy, it has never been shown that they are in fact two separate substances. We provide the first strong evidence that they are separate by ruling out a broad class of so-called unified dark matter models that have attracted much recent interest. We find that they produce oscillations or exponential blowup of the matter power spectrum inconsistent with observation. For the particular case of generalized Chaplygin gas models, 99.999% of the previously allowed parameter space is excluded, leaving essentially only the standard Lambda-CDM limit allowed.
              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Limits on the variability of G using binary-pulsar data.

              (1988)
                Bookmark

                Author and article information

                Journal
                16 June 2009
                2009-07-26
                Article
                10.1016/j.physletb.2009.07.048
                0906.2847

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

                Custom metadata
                Phys.Lett.B679:172-176,2009
                6 pages, no figure. Version to appear in PLB (2009)
                hep-th astro-ph.CO gr-qc

                Comments

                Comment on this article