Time Lumps in Nonlocal Stringy Models and Cosmological Applications

Details Time Lumps in Nonlocal Stringy Models and Cosmological Applications Time Lumps in Nonlocal Stringy Models and Cosmological Applications

2005-04-25

arxiv.org/abs/hep-th/0504200v2

JHEP 0510 (2005) 087

Physics

High Energy Physics

High Energy Physics - Theory

Latex, 24 pages, 13 figures, Typos corrected, references added

Scientific paper

10.1088/1126-6708/2005/10/087

We study lump solutions in nonlocal toy models and their cosmological applications. These models are motivated by a description of D-brane decay within string field theory framework. In order to find cosmological solutions we use the simplest local approximation keeping only second derivative terms in nonlocal dynamics. We study a validity of this approximation in flat background where time lump solutions can be written explicitly. We work out the validity of this approximation. We show that our models at large time exhibit the phantom behaviour similar to the case of the string kink.

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