CMB CosmologyNo Access

QUANTUM FLUCTUATIONS IN THE INFLATIONARY UNIVERSE

SANG PYO KIM

Department of Physics, Kunsan National University, Kunsan 573-701, Korea

Asia Pacific Center for Theoretical Physics, Pohang 790-784, Korea

https://doi.org/10.1142/S0217732307025145Cited by:1 (Source: Crossref)

Abstract

The recent three-year WMAP data selects large-field models with certain power-law potentials and small-field models for all power-law potentials as consistent inflation models. We study the large-field and small-field inflation model with a quadratic and a quartic potential within the framework of quantum field theory in an expanding Friedmann-Robertson-Walker universe. We find that quantum fluctuations in the small-field model lead to a significant contribution to the effective potential and may have non-negligible effects on the slow-roll parameters predicted by classical theory.

Keywords:

PACS: 98.80.Cq, 42.62.+v, 98.80.-k, 98.70.Vc

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