Duality in cosmological perturbation theory

R. Brustein, M. Gasperini, G. Veneziano

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


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.

Original languageEnglish
Pages (from-to)277-285
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
StatePublished - 16 Jul 1998

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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