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The Trans-Planckian Problem of Inflationary Cosmology

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arxiv hep-th/0005209 v2 pith:AW3L3FFM submitted 2000-05-23 hep-th astro-phgr-qchep-ph

Jerome Martin , Robert H. Brandenberger This is my paper
classification hep-thastro-phgr-qchep-ph
keywords physicsinflationusualcosmologyfluctuationsinflationarymattermodels
verification ladder T0 review T1 audit T2 compute T3 formal
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In most current models of inflation based on a weakly self-coupled scalar matter field minimally coupled to gravity, the period of inflation lasts so long that, at the beginning of the inflationary period, the physical wavelengths of comoving scales which correspond to the present large-scale structure of the Universe were smaller than the Planck length. Thus, the usual computations of the spectrum of fluctuations in these models involve extrapolating low energy physics (both in the matter and gravitational sector) into regions where this physics is not applicable. In this paper we demonstrate that the usual predictions of inflation for the spectrum of cosmological fluctuations do indeed depend on the hidden assumptions about super-Planck scale physics. We introduce a class of modified dispersion relations to mimic possible effects of super-Planck scale physics, and show that in some cases important deviations from the usual predictions of inflation are obtained. Some implications of this result for the unification of fundamental physics and early Universe cosmology are discussed.

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Cited by 11 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. TransPlanckian Censorship on Dark Dimension Inflation

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  10. UV Effects and Short-Lived Hawking Radiation: Alternative Resolution of Information Paradox

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    Hawking radiation terminates around the scrambling time due to trans-Planckian stringy effects in GUP and string-field-theory-inspired toy models, yielding negligible evaporation and a mostly classical black hole.

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