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Slow-roll parameters in braneworld cosmologies

Gianluca Calcagni
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Abstract

We present a general slow-roll formalism within braneworld-motivated cosmologies with non-standard effective Friedmann equations. Full towers of parameters involving either the inflaton potential or the Hubble parameter are constructed and the dynamics of non-tachyonic and tachyonic fields are considered in detail; exact cosmological solutions and the inflationary attractor condition are provided. We compare scalar-driven and tachyon-driven accelerating eras through slow-roll correspondence and the observational imprint on early-universe structures.

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Gianluca Calcagni. 2004-04-22. Slow-roll parameters in braneworld cosmologies. https://doi.org/10.1103/physrevd.69.103508

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