TY - JOUR

T1 - Duality in cosmological perturbation theory

AU - Brustein, R.

AU - Gasperini, M.

AU - Veneziano, G.

N1 - Funding Information:
We are grateful to A. Buonanno, K.A. Meissner and C. Ungarelli for interesting discussions. R. B. is supported in part by the Israel Science Foundation administered by the Israel Academy of Sciences and Humanities.

PY - 1998/7/16

Y1 - 1998/7/16

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0347603205&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(98)00576-0

DO - 10.1016/S0370-2693(98)00576-0

M3 - Article

AN - SCOPUS:0347603205

SN - 0370-2693

VL - 431

SP - 277

EP - 285

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3-4

ER -