Duality in cosmological perturbation theory

Details Duality in cosmological perturbation theory Duality in cosmological perturbation theory

1998-03-03

arxiv.org/abs/hep-th/9803018v1

Phys.Lett. B431 (1998) 277-285

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, LATEX, no figures

Scientific paper

10.1016/S0370-2693(98)00576-0

Cosmological perturbation equations derived from low-energy effective actions are shown to be invariant under a duality transformation reminiscent of electric-magnetic, strong-weak coupling, S-duality. A manifestly duality-invariant approximation for perturbations far outside the horizon is introduced, and it is argued to be useful even during a high curvature epoch. Duality manifests itself through a remnant symmetry acting on the classical moduli of cosmological models, and implying lower bounds on the number and energy density of produced particles.

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