Cosmological perturbations across a curvature bounce

Details Cosmological perturbations across a curvature bounce Cosmological perturbations across a curvature bounce

2004-01-16

arxiv.org/abs/hep-th/0401112v1

Nucl.Phys. B694 (2004) 206-238

Physics

High Energy Physics

High Energy Physics - Theory

36 pages, 5 included figures

Scientific paper

10.1016/j.nuclphysb.2004.06.020

String-inspired cosmologies, whereby a non-singular curvature bounce is induced by a general-covariant, $T$-duality-invariant, non-local dilaton potential, are used to study numerically how inhomogeneities evolve and to compare the outcome with analytic expressions obtained through different matching conditions across the bounce. Good agreement is found if continuity across the bounce is assumed to hold for $\cal{R}$, the curvature perturbation on comoving hypersurfaces, rather than for the Bardeen potential.

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