Quantifying the behaviour of curvature perturbations near Horizon Crossing

Autor:	Nalson, Ellie, Christopherson, Adam J., Huston, Ian, Malik, Karim A.
Rok vydání:	2013
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.1142/9789814623995_0214
Popis:	How much does the curvature perturbation change after it leaves the horizon, and when should one evaluate the power spectrum? To answer these questions we study single field inflation models numerically, and compare the evolution of different curvature perturbations from horizon crossing to the end of inflation. We find that e.g. in chaotic inflation, the amplitude of the comoving and the curvature perturbation on uniform density hypersurfaces differ by up to 180 \% at horizon crossing assuming the same amplitude at the end of inflation, and that it takes approximately 3 efolds for the curvature perturbation to be within 1 \% of its value at the end of inflation. Comment: 3 pages, 1 figure, Proceedings of 13th Marcel Grossmann Meeting, Stockholm, July 2012
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1301.7613 Zobrazit plný text záznamu View this record from Arxiv