Phys. Rev. D 74, 103501 (2006) [6 pages]

Planck scale inflationary spectra from quantum gravity

Abstract

References

Citing Articles (3)

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Gian Luigi Alberghi^1,2,*, Roberto Casadio^1,†, and Alessandro Tronconi^1,‡
¹Dipartimento di Fisica, Università di Bologna, and I.N.F.N., Sezione di Bologna, via Irnerio 46, 40126 Bologna, Italy
²Department of Astronomy, University of Bologna, via Ranzani 1, 40127 Bologna, Italy

Received 19 June 2006; published 1 November 2006

We derive the semiclassical evolution of massless minimally coupled scalar matter in the de Sitter space-time from the Born-Oppenheimer reduction of the Wheeler-DeWitt equation. We show that the dynamics of trans-Planckian modes can be cast in the form of an effective modified dispersion relation and that high energy corrections in the power spectrum of the cosmic microwave background radiation produced during inflation remain very small if the initial state is the Bunch-Davies vacuum.

URL:

http://link.aps.org/doi/10.1103/PhysRevD.74.103501

DOI:

10.1103/PhysRevD.74.103501

PACS:

98.80.Cq, 04.60.Ds, 04.62.+v, 98.70.Vc

^*Electronic address: alberghi@bo.infn.it

^†Electronic address: casadio@bo.infn.it

^‡Electronic address: tronconi@bo.infn.it

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Phys. Rev. D 74, 103501 (2006) [6 pages]

Planck scale inflationary spectra from quantum gravity