Super-Horizon Scale Dynamics of Multi-Scalar Inflation | Zendy

Misao Sasaki | Zendy; Takahiro Tanaka | Zendy

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Super-Horizon Scale Dynamics of Multi-Scalar Inflation

Author(s) -

Misao Sasaki,

Takahiro Tanaka

Publication year - 1998

Publication title -

progress of theoretical physics

Language(s) - English

Resource type - Journals

eISSN - 1347-4081

pISSN - 0033-068X

DOI - 10.1143/ptp.99.763

Subject(s) - physics , horizon , scalar field , long wavelength limit , nonlinear system , perturbation (astronomy) , cosmology , classical mechanics , formalism (music) , scalar (mathematics) , statistical physics , theoretical physics , quantum mechanics , mathematics , art , musical , geometry , astronomy , visual arts

We consider the dynamics of a multi-component scalar field on super-horizonscales in the context of inflationary cosmology. We present a method to solvethe perturbation equations on super- horizon scales, i.e., in the longwavelength limit, by using only the knowledge of spatially homogeneousbackground solutions. In doing so, we clarify the relation between theperturbation equations in the long wavelength limit and the backgroundequations. Then as a natural extension of our formalism, we provide a strategyto study super-horizon scale perturbations beyond the standard linearperturbation theory. Namely we reformulate our method so as to take intoaccount the nonlinear dynamics of the scalar field.Comment: 14 pages, typos corrected, to be published in Prog. Theor. Phys. 99 (1998

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