On the perturbation theory in spatially closed background
Cosmology and Nongalactic Astrophysics
2014-06-06 v1 General Relativity and Quantum Cosmology
Abstract
In this article,we investigate some features of the perturbation theory in spatially closed universe. We will show that the perturbative field equations in a spatially closed universe always have two independent adiabatic solutions provided that the wavelengths of perturbation modes are very longer than the Hubble horizon. It will be revealed that these adiabatic solutions do not depend on the curvature directly. We also propound a new interpretation for the curvature perturbation in terms of the unperturbed geometry.
Keywords
Cite
@article{arxiv.1405.4466,
title = {On the perturbation theory in spatially closed background},
author = {Ali A. Asgari and Amir H. Abbassi and Jafar Khodagholizadeh},
journal= {arXiv preprint arXiv:1405.4466},
year = {2014}
}
Comments
25 pages,no figures,accepted for publiction in EPJC