We derive the semiclassical evolution of massless conformally coupled scalar matter in the de Sitter space-time from the Born-Oppenheimer reduction of the Wheeler-DeWitt equation. We find a remarkable difference with respect to the minimally coupled case: the effect of the quantum gravitational corrections does not depend on the momentum of the scalar mode up to second order in the Planck length and, therefore, there are no relevant corrections to the dispersion relation.

Inflation and the semiclassical dynamics of a conformal scalar field

ALBERGHI, GIAN LUIGI;CASADIO, ROBERTO;TRONCONI, ALESSANDRO
2008

Abstract

We derive the semiclassical evolution of massless conformally coupled scalar matter in the de Sitter space-time from the Born-Oppenheimer reduction of the Wheeler-DeWitt equation. We find a remarkable difference with respect to the minimally coupled case: the effect of the quantum gravitational corrections does not depend on the momentum of the scalar mode up to second order in the Planck length and, therefore, there are no relevant corrections to the dispersion relation.
G.L. Alberghi; C. Appignani; R. Casadio; F. Sbisa'; A. Tronconi
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/53843
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