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arXiv · hep-th/9803018

Duality in cosmological perturbation theory

R. Brustein·M. Gasperini·G. Veneziano
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Abstract

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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R. Brustein, M. Gasperini, G. Veneziano. 1998-03-03. Duality in cosmological perturbation theory. https://doi.org/10.1016/s0370-2693(98)00576-0

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