Cosmological and Wormhole Solutions in Low-Energy Effective String Theory

Details Cosmological and Wormhole Solutions in Low-Energy Effective String Theory Cosmological and Wormhole Solutions in Low-Energy Effective String Theory

1994-06-09

arxiv.org/abs/hep-th/9406053v1

Phys.Rev. D50 (1994) 6435-6443

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, Plain-Tex Report No: INFNCA-TH-94-11, SISSA 75/94/A

Scientific paper

10.1103/PhysRevD.50.6435

We derive and study a class of cosmological and wormhole solutions of low-energy effective string field theory. We consider a general four-dimensional string effective action where moduli of the compactified manifold and the electromagnetic field are present. The cosmological solutions of the two-dimensional effective theory obtained by dimensional reduction of the former are discussed. In particular we demonstrate that the two-dimensional theory possesses a scale-factor duality invariance. Euclidean four-dimensional instantons describing the nucleation of the baby universes are found and the probability amplitude for the nucleation process is given.

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