Adiabatic and entropy perturbations from inflation

@inproceedings{GordonAdiabaticAE,
  title={Adiabatic and entropy perturbations from inflation},
  author={Christopher Gordon and David Wands and B. A. Bassett and Roy Maartens}
}
We study adiabatic (curvature) and entropy (isocurvature) perturbations produced during a period of cosmological inflation that is driven by multiple scalar fields with an arbitrary interaction potential. A local rotation in field space is performed to separate out the adiabatic and entropy modes. The resulting field equations show explicitly how on large scales entropy perturbations can source adiabatic perturbations if the background solution follows a curved trajectory in field space, and… CONTINUE READING
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