The Corley-Jacobson dispersion relation and trans-Planckian inflation

Details The Corley-Jacobson dispersion relation and trans-Planckian inflation The Corley-Jacobson dispersion relation and trans-Planckian inflation

2002-01-24

arxiv.org/abs/hep-th/0201189v1

Phys.Rev. D65 (2002) 103514

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, Revtex4

Scientific paper

10.1103/PhysRevD.65.103514

In this Letter we study the dependence of the spectrum of fluctuations in inflationary cosmology on possible effects of trans-Planckian physics, using the Corley/Jacobson dispersion relations as an example. We compare the methods used in previous work [1] with the WKB approximation, give a new exact analytical result, and study the dependence of the spectrum obtained using the approximate method of Ref. [1] on the choice of the matching time between different time intervals. We also comment on recent work subsequent to Ref. [1] on the trans-Planckian problem for inflationary cosmology.

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