English

Dynamics in Nonlocal Cosmological Models Derived from String Field Theory

High Energy Physics - Theory 2008-11-26 v3 Astrophysics General Relativity and Quantum Cosmology

Abstract

A general class of nonlocal cosmological models is considered. A new method for solving nonlocal Friedmann equations is proposed, and solutions of the Friedmann equations with nonlocal operator are presented. The cosmological properties of these solutions are discussed. Especially indicated is pp-adic cosmological model in which we have obtained nonsingular bouncing solution and string field theory tachyon model in which we have obtained full solution of nonlocal Friedmann equations with w=1w=-1 at large times. The possibility of obtaining realistic value of cosmological constant from nonlocal cosmological models is also discussed.

Keywords

Cite

@article{arxiv.0707.1545,
  title  = {Dynamics in Nonlocal Cosmological Models Derived from String Field Theory},
  author = {Liudmila Joukovskaya},
  journal= {arXiv preprint arXiv:0707.1545},
  year   = {2008}
}

Comments

21 pages, 7 figures, v3: updated to match PRD version

R2 v1 2026-06-21T08:57:04.370Z