Particle Production in Matrix Cosmology

Details Particle Production in Matrix Cosmology Particle Production in Matrix Cosmology

2004-03-28

arxiv.org/abs/hep-th/0403275v2

Phys.Rev. D70 (2004) 044017

Physics

High Energy Physics

High Energy Physics - Theory

24 pages, 1 figure; v2: references added, minor changes

Scientific paper

10.1103/PhysRevD.70.044017

We consider cosmological particle production in 1+1 dimensional string theory. The process is described most efficiently in terms of anomalies, but we also discuss the explicit mode expansions. In matrix cosmology the usual vacuum ambiguity of quantum fields in time-dependent backgrounds is resolved by the underlying matrix model. This leads to a finite energy density for the "in" state which cancels the effect of anomalous particle production.

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