Semiclassical relations and IR effects in de Sitter and slow-roll space-times

Дата и время публикации : 2010-05-06T18:54:32Z

Авторы публикации и институты :
Steven B. Giddings
Martin S. Sloth

Ссылка на журнал-издание: JCAP 1101:023,2011
Коментарии к cтатье: 32 pages, 2 figures; v2: running of spectral index included and other minor changes; v3: minor changes to agree with published version
Первичная категория: hep-th

Все категории : hep-th, astro-ph.CO, gr-qc

Краткий обзор статьи: We calculate IR divergent graviton one-loop corrections to scalar correlators in de Sitter space, and show that the leading IR contribution may be reproduced via simple semiclassical consistency relations. One can likewise use such semiclassical relations to calculate leading IR corrections to correlators in slow-roll inflation. The regulated corrections shift the tensor/scalar ratio and consistency relation of single field inflation, and non-gaussianity parameters averaged over very large distances. For inflation of sufficient duration, for example arising from a chaotic inflationary scenario, these corrections become of order unity. First-order corrections of this size indicate a breakdown of the perturbative expansion, and suggest the need for a non-perturbative description of the corresponding regime. This is analogous to a situation argued to arise in black hole evolution, and to interfere with a sharp perturbative calculation of "missing information" in Hawking radiation.

Category: Physics