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Dynamics of Generalized Assisted Inflation

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arxiv gr-qc/0602077 v1 pith:SV7HGI64 submitted 2006-02-20 gr-qc hep-th

Jelle Hartong , André Ploegh , Thomas Van Riet , Dennis B. Westra This is my paper · ORCID
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keywords assistedinflationgeneralizedcriticaldynamicsfieldspointspotential
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We study the dynamics of multiple scalar fields and a barotropic fluid in an FLRW-universe. The scalar potential is a sum of exponentials. All critical points are constructed and these include scaling and de Sitter solutions. A stability analysis of the critical points is performed for generalized assisted inflation, which is an extension of assisted inflation where the fields mutually interact. Effects in generalized assisted inflation which differ from assisted inflation are emphasized. One such a difference is that an (inflationary) attractor can exist if some of the exponential terms in the potential are negative.

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    For open FLRW universes in two-scalar exponential-potential models from 10d IIA supergravity, the late-time attractor sets the effective exponent to the shortest vector to the convex hull of potential exponents, givin...

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