The phenomenology of Dvali–Gabadadze–Porrati cosmologies

By A. Lue. 2005

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Cosmologists today are confronted with the perplexing reality that the universe is currently accelerating in its expansion. Nevertheless, the nature of the fuel that drives today's cosmic acceleration is an open and tantalizing mystery. There exists the intriguing possibility that the acceleration is not the manifestation of yet another mysterious ingredient in the cosmic gas tank (dark energy), but rather our first real lack of understanding of gravity itself, and even possibly a signal that there might exist dimensions beyond that which we can currently observe. The braneworld model of Dvali, Gabadadze and Porrati (DGP) is a theory where gravity is altered at immense distances by the excruciatingly slow leakage of gravity off our three-dimensional Universe and, as a modified-gravity theory, has pioneered this line of investigation. I review the underlying structure of DGP gravity and those phenomenological developments relevant to cosmologists interested in a pedagogical treatment of this intriguing model.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/dce8aedf796a8e358579cab95c93e8447b6c2dd4

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Citations in the corpus

Modified Gravity and Cosmology (2011, background): “A thorough review of DGP cosmology up to 2006 can be found in [834].”
Scrutinizing Exotic Cosmological Models Using ESSENCE Supernova Data Combined with Other Cosmological Probes (2007, background): “Lue (2006) show how the growth of large-scale structure proceeds in the DGP model, but the position of the BAO peak is not expected to be influenced by this modification (Yamamoto et al. 2006).”
Categorizing Different Approaches to the Cosmological Constant Problem (2004, background): “In the DGP model, the extra dimensions are infinitely large, and in the literature, there is an ongoing discussion whether this model is experimentally viable and capable of avoiding the massive gravity difficulties, see [181, 182, 183, 184, 185, 186] for criticism.”
Observational probes of cosmic acceleration (2012, background): “For a generic class of theories, the value of GNewton would be higher by 4/3 in unscreened environments, allowing order unity effects (see, for example, the discussion of f(R) gravity by Chiba 2003 and DGP gravity by Lue 2006).”