Fluid Inflation

Дата и время публикации : 2013-06-12T17:21:00Z

Авторы публикации и институты :
Xingang Chen
Hassan Firouzjahi
Mohammad Hossein Namjoo
Misao Sasaki

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: Minor revisions, discussions improved, new references added, JCAP published version
Первичная категория: hep-th

Все категории : hep-th, astro-ph.CO

Краткий обзор статьи: In this work we present an inflationary mechanism based on fluid dynamics. Starting with the action for a single barotropic perfect fluid, we outline the procedure to calculate the power spectrum and the bispectrum of the curvature perturbation. It is shown that a perfect barotropic fluid naturally gives rise to a non-attractor inflationary universe in which the curvature perturbation is not frozen on super-horizon scales. We show that a scale-invariant power spectrum can be obtained with the local non-Gaussianity parameter $f_{NL}= 5/2$.

Category: Physics