Dynamics in Nonlocal Cosmological Models Derived from String Field Theory

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 $p$-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 $w=-1$ at large times. The possibility of obtaining realistic value of cosmological constant from nonlocal cosmological models is also discussed.

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

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Cited by in corpus (5)

• Localization of nonlocal theories
• Dynamics in nonlocal linear models in the Friedmann-Robertson-Walker metric
• Stringy Model of Cosmological Dark Energy
• Quantum Cosmology and Tachyons
• Exact Solutions in Nonlocal Linear Models