Validity of the semiclassical approximation during the preheating phase of chaotic inflation

Details Validity of the semiclassical approximation during the preheating phase of chaotic inflation Validity of the semiclassical approximation during the preheating phase of chaotic inflation

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..apr.d7004a&link_type=abstract

American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #D7.004

Physics

Scientific paper

The semiclassical approximation has typically been used to describe the initial stage of particle production, often called preheating, which occurs after the inflationary epoch in chaotic models of inflation. During this phase backreaction effects on the inflaton field from the produced particles are significant and one might be concerned about the validity of the semiclassical approximation, even though large backreaction effects are allowed if the inflaton field is coupled to a large number of quantum fields. A criteria will be presented for the validity of the semiclassical approximation in this case. The question of whether this criterion is satisfied during preheating will be addressed.

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