Quantum Fluctuations in the Inflationary Universe

Details Quantum Fluctuations in the Inflationary Universe Quantum Fluctuations in the Inflationary Universe

2007-01-13

arxiv.org/abs/astro-ph/0701399v1

Mod.Phys.Lett.A22:1921-1928,2007

Astronomy and Astrophysics

Astrophysics

RevTex, 10 pages, no figure; Invited talk at CosPA 2006, National Taiwan Univ., Taiwan, Nov. 15-17, 2006

Scientific paper

10.1142/S0217732307025145

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.

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