Large N wormhole approach to spacetime foam

Abstract

A simple model of spacetime foam, made by $N$ wormholes in a semiclassical approximation, is taken under examination. We show that the qualitative behaviour of the fluctuation of the metric conjectured by Wheeler is here reproduced.

Revtex 3.0, 12 pages, accepted in Phys. Lett. B, Acknowledgements included

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