a Darkless Space Time

Details a Darkless Space Time a Darkless Space Time

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mgm..conf.1755t&link_type=abstract

"THE ELEVENTH MARCEL GROSSMANN MEETING On Recent Developments in Theoretical and Experimental General Relativity, Gravitation an

Physics

Cosmology, Defects, Accelerated Expansion

Scientific paper

Instead of introducing an ad hoc dark energy in order to explain the accelerated expansion of the universe, we try a different approach treating space time as a physical continuum endowed of specific properties. A Lagrangian modeled on the one valid for simple dissipative phenomena in fluids is build and used for empty space time. The internal "viscosity" is shown to correspond to a four-vector field. Using the known symmetry of the universe, assuming the vector field to be divergence-less and solving the Euler-Lagrange equation we directly obtain inflation and a phase of accelerated expansion of space time. The vector field is shown to correspond to the displacement vector field induced by a point defect in a four-dimensional continuum. The presence of ordinary matter does not spoil the obtained general behaviour.

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