Thermodynamics and general relativity could determine the geometry of the universe
- 70 Downloads
We introduce a suggestive model where certain quantities in Friedmann models are treated like their thermodynamic counterparts; temperature entropy, Gibbs energy, and so on. Within this model, changes in the symmetry of the universe are interpreted as first- or second-order phase transitions. The thermodynamics we introduce give us a new way of determining the geometry of the universe. By choosing a specific local equation of state (P=αρ), we show that with respect to the thermodynamics we have introduced, it is always more advantageous for the universe to be in a Bianchi V (open) symmetric state.
KeywordsEntropy Phase Transition General Relativity Gibbs Energy Differential Geometry
Unable to display preview. Download preview PDF.
- 1.Bekenstein, J. D. (1980).Phys. Today.Google Scholar
- 2.Bonnor, W. B. (1985).Phys. Lett. A.,112, 26.Google Scholar
- 3.Swalin, R. A. (1972).Thermodynamics of Solids (John Wiley & Sons, New York).Google Scholar
- 4.Tolman, R. C. (1934).Relativity, Thermodynamics and Cosmology (Oxford University Press, Oxford).Google Scholar
- 5.Dicke, R. H., and Peebles, J. E. (1964).Phys. Rev. Lett.,12, 435.Google Scholar
- 6.Gott, J. R. (1982).Nature,295, 304.Google Scholar
- 7.Steigman, G. (1985).Ann. Rev. Astron. Astrophys.,23, 319.Google Scholar
- 8.Bayin, S. Ş. (1987). Submitted toAp. J. Google Scholar
- 9.Weinberg, S. (1972).Gravitation and Cosmology (John Wiley & Sons, New York), 506.Google Scholar