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Bouncing and Accelerating Solutions in Nonlocal Stringy Models

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arxiv hep-th/0701184 v4 pith:KJ5AMRUK submitted 2007-01-19 hep-th astro-phgr-qc

I.Ya. Aref'eva , L.V. Joukovskaya , S.Yu. Vernov This is my paper · ORCID
classification hep-thastro-phgr-qc
keywords solutionsfieldmodelmodelsstringacceleratingbouncingdeformations
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A general class of cosmological models driven by a non-local scalar field inspired by string field theories is studied. In particular cases the scalar field is a string dilaton or a string tachyon. A distinguished feature of these models is a crossing of the phantom divide. We reveal the nature of this phenomena showing that it is caused by an equivalence of the initial non-local model to a model with an infinite number of local fields some of which are ghosts. Deformations of the model that admit exact solutions are constructed. These deformations contain locking potentials that stabilize solutions. Bouncing and accelerating solutions are presented.

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Cited by 1 Pith paper

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  1. Non-singular bounce solutions in Myrzakulov $f(R,T)$ gravity

    gr-qc 2025-01 reject novelty 4.0 of 10

    In Myrzakulov F(R,T) gravity, free connection functions can be chosen to produce matter-bounce backgrounds with a scale-invariant scalar power spectrum.

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