Entropy and initial conditions in cosmology
arXiv:hep-th/0701146
Abstract
I discuss the Boltzmann-Penrose question of why the initial conditions for cosmology have low entropy. The modern version of Boltzmann's answer to this question, due to Dyson, Kleban and Susskind, seems to imply that the typical intelligent observer arises through thermal fluctuation, rather than cosmology and evolution. I investigate whether this can be resolved within the string landscape. I end with a review of the suggestion that Holographic Cosmology provides a simpler answer to the problem. This paper is a revision of unpublished work from the spring of 2006, combined with my talk at the Madrid conference on String theory and Cosmology, Nov 2006.
JHEP Latex, 37 pages
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- Inflation Expels Runaways
- Symmetric-Bounce Quantum State of the Universe
- Initial Conditions for Bubble Universes
- Agnesi Weighting for the Measure Problem of Cosmology
- No-Bang Quantum State of the Cosmos
- Typicality, Freak Observers and the Anthropic Principle of Existence
- Spacetime Average Density (SAD) Cosmological Measures
- Possible Anthropic Support for a Decaying Universe: A Cosmic Doomsday Argument
- On the Carroll-Chen Model