منابع مشابه
Mirage Cosmology
A brane universe moving in a curved higher dimensional bulk space is considered. The motion induces a cosmological evolution on the universe brane that is indistinguishable from a similar one induced by matter density on the brane. The phenomenological implications of such an idea are discussed. Various mirage energy densities are found, corresponding to dilute matter driving the cosmological e...
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This is a series of lectures on M-theory for cosmologists. After summarizing some of the main properties of M-theory and its dualities I show how it can be used to address various fundamental and phenomenological issues in cosmology.
متن کاملClosed Universe in Mirage Cosmology
We study the cosmological evolution of the closed universe on a spherical probe brane moving in the AdSm × S background and the near-horizon background of the dilatonic D-branes. The Friedmann equations describing the evolution of the brane universe, and the effective energy density and pressure simulated on the probe brane due to its motion in the curved background spacetime are obtained and a...
متن کاملBrane Inflation from Mirage Cosmology
We study the cosmological evolution of a D3-brane universe in a type 0 string background. We follow the brane-universe along the radial coordinate of the background and we calculate the energy density which is induced on the brane because of its motion in the bulk. We find that for some typical values of the parameters the brane-universe has an inflationary phase.
متن کاملSupergravity, M theory and Cosmology
We discuss some recent attempts to reconcile cosmology with supergravity and M/string theory. First of all, we point out that in extended supergravities the scalar masses are quantized in terms of the cosmological constant in de Sitter vacua: the eigenvalues of the Casimir operator 3m/Λ take integer values. For the current value of the cosmological constant extended supergravities predict ultra...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2002
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(02)02815-0