Prohibition of large inhomogeneity in the preinflationary stage

Details Prohibition of large inhomogeneity in the preinflationary stage Prohibition of large inhomogeneity in the preinflationary stage

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phrvd..49.3886c&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 49, Issue 8, 15 April 1994, pp.3886-3892

Physics

6

Particle-Theory And Field-Theory Models Of The Early Universe, Initial Value Problem, Existence And Uniqueness Of Solutions

Scientific paper

We examine the spherically symmetric and asymptotically spatially flat inhomogeneous initial data of an inflaton field to see its effect on the evolution of space-time. We search for the apparent horizon in those initial data and show the relation of the scale of inhomogeneity and the amplitude of the inflaton field to the formation of a horizon. We find that for a certain range of Hubble constant there is no regular initial condition but the ``bag of gold singularity'' appears if the inhomogeneity of the inflaton field is large enough (δφ>~mPl).

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