REVIEW
Particle Production from Geometric Transition in Expanding Universe
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classification
gr-qc
keywords
productionexpandinggeometricparticlechannelsclosedcomplexevolution
read the original abstract
The geometric transitions from the evolution in the complex plane of time provide channels for particle production for a quantum field in expanding universes. The production rate for one pair is obtained by squaring and summing the scattering matrix between the in-vacuum and the transported one over all possible independent closed paths of winding number 1.
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