Resolving scalar field perturbations into entropy and adiabatic components

Details Resolving scalar field perturbations into entropy and adiabatic components Resolving scalar field perturbations into entropy and adiabatic components

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..555..297g&link_type=abstract

Cosmology and Particle Physics: CAPP 2000. AIP Conference Proceedings, Volume 555, pp. 297-300 (2001).

Physics

Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

The formalism developed in [1] is summarized. We studied 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 how adiabatic perturbations cannot source entropy perturbations in the long-wavelength limit. .

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