Perturbation spectrum in inflation with cutoff

Details Perturbation spectrum in inflation with cutoff Perturbation spectrum in inflation with cutoff

2001-03-14

arxiv.org/abs/astro-ph/0103225v2

Phys.Rev. D64 (2001) 103501

Astronomy and Astrophysics

Astrophysics

6 pages; matches version accepted by PRD

Scientific paper

10.1103/PhysRevD.64.103501

It has been pointed out that the perturbation spectrum predicted by inflation may be sensitive to a natural ultraviolet cutoff, thus potentially providing an experimentally accessible window to aspects of Planck scale physics. A priori, a natural ultraviolet cutoff could take any form, but a fairly general classification of possible Planck scale cutoffs has been given. One of those categorized cutoffs, also appearing in various studies of quantum gravity and string theory, has recently been implemented into the standard inflationary scenario. Here, we continue this approach by investigating its effects on the predicted perturbation spectrum. We find that the size of the effect depends sensitively on the scale separation between cutoff and horizon during inflation.

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