Thermodynamics and general relativity could determine the geometry ofthe universe.

Details Thermodynamics and general relativity could determine the geometry ofthe universe. Thermodynamics and general relativity could determine the geometry ofthe universe.

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987gregr..19..899b&link_type=abstract

General Relativity and Gravitation, Volume 19, Issue 9, pp.899-906

Physics

1

Cosmology:General Relativity, General Relativity:Cosmology, General Relativity:Thermodynamics, Thermodynamics:General Relativity

Scientific paper

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.

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