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Cosmological Models and Renormalization Group Flow | | K.R. Kristjansson
; L. Thorlacius
; | | Date: |
6 Apr 2002 | | Journal: | JHEP 0205 (2002) 011 | | Subject: | hep-th gr-qc | | Abstract: | We study cosmological solutions of Einstein gravity with a positive cosmological constant in diverse dimensions. These include big-bang models that re-collapse, big-bang models that approach de Sitter acceleration at late times, and bounce models that are both past and future asymptotically de Sitter. The re-collapsing and the bounce geometries are all tall in the sense that entire spatial slices become visible to a comoving observer before the end of conformal time, while the accelerating big-bang geometries can be either short or tall. We consider the interpretation of these cosmological solutions as renormalization group flows in a dual field theory and give a geometric interpretation of the associated c-function as the area of the apparent cosmological horizon in Planck units. The covariant entropy bound requires quantum effects to modify the early causal structure of some of our big-bang solutions. | | Source: | arXiv, hep-th/0204058 | | Services: | Forum | Review | PDF | Favorites | |
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