Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2004-08-24
Class.Quant.Grav.22:59-84,2005
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
31 pages, 5 figures, revtex4, revised for publication with extended list of references
Scientific paper
10.1088/0264-9381/22/1/005
We work in the locally de Sitter background of an inflating universe and consider a massless, minimally coupled scalar with a quartic self-interaction. We use dimensional regularization to compute the fully renormalized scalar self-mass-squared at one and two loop order for a state which is released in Bunch-Davies vacuum at t=0. Although the field strength and coupling constant renormalizations are identical to those of lfat space, the geometry induces a non-zero mass renormalization. The finite part also shows a sort of growing mass that competes with the classical force in eventually turning off this system's super-acceleration.
Brunier Tristan
Onemli Vakif K.
Woodard Richard P.
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