Duality in cosmological perturbation theory

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 introduc...

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Bibliographic Details
Published in:Physics letters. B 1998-07, Vol.431 (3), p.277-285
Main Authors: Brustein, R., Gasperini, M., Veneziano, G.
Format: Article
Language:English
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Summary: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.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(98)00576-0