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Title: Non-linear resonance in relativistic preheating

Inflation in the early Universe can be followed by a brief period of preheating, resulting in rapid and non-equilibrium particle production through the dynamics of parametric resonance. However, the parametric resonance effect is very sensitive to the linearity of the reheating sector. Additional self-interactions in the reheating sector, such as non-canonical kinetic terms like the DBI Lagrangian, may enhance or frustrate the parametric resonance effect of preheating. In the case of a DBI reheating sector, preheating is described by parametric resonance of a damped relativistic harmonic oscillator. In this paper, we illustrate how the non-linear terms in the relativistic oscillator shut down the parametric resonance effect. This limits the effectiveness of preheating when there are non-linear self-interactions.
Authors:
;  [1]
  1. Department of Physics, Pacific Lutheran University, 12180 Park Ave S, Tacoma, WA, 98447 U.S.A (United States)
Publication Date:
OSTI Identifier:
22373673
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 04; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGICAL INFLATION; EQUILIBRIUM; HARMONIC OSCILLATORS; HEAT TREATMENTS; INTERACTIONS; LAGRANGIAN FUNCTION; NONLINEAR PROBLEMS; OSCILLATORS; PARTICLE PRODUCTION; RELATIVISTIC RANGE; RESONANCE; UNIVERSE