Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-03-03
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.
Brustein Ram
Gasperini Maurizio
Veneziano Gabriele
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