Massive vector field and initial singularity problem in a charged universe

Details Massive vector field and initial singularity problem in a charged universe Massive vector field and initial singularity problem in a charged universe

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phlb..251..493k&link_type=abstract

Physics Letters B, Volume 251, Issue 4, p. 493-497.

Physics

1

Scientific paper

We find that a massive U (1) vector field Aμ in a charged Robertson-Walker universe for k=+1, 0, and -1 can solve the initial singularity problem even at the level of classical gravity because the energy density becomes negative as the scale factor a of the metric approaches zero. Namely, our universe might have started to expand from a finite size a0. The condition that the universe expands from a0 larger than the Planck scale gives a constraint on the charge density at t=0.

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