Nonthermal phase transitions after inflation.

@article{Kofman1996NonthermalPT,
  title={Nonthermal phase transitions after inflation.},
  author={Kofman and Linde and Starobinsky},
  journal={Physical review letters},
  year={1996},
  volume={76 7},
  pages={
          1011-1014
        }
}
Landau Institute for Theoretical Physics, Kosygina St. 2, Moscow 117334, Russia(October 17, 1995)At the first stage of reheating after inflation, parametric resonance may rapidly transfer most ofthe energy of an inflaton field φ to the energy of other bosons. We show that quantum fluctuationsof scalar and vector fields produced at this stage are much greater than they would be in a state ofthermal equilibrium. This leads to cosmological phase transitions of a new type, which may resultin a copious… 
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