Strings as a Model for Parent and Baby Universes: Total Splitting Rates

Abstract

Emission of hard microscopic string (graviton) by an excited macroscopic string may be viewed as a model of branching of a $(1+1)$-dimensional baby universe off large parent one. We show that, apart from a trivial factor, the total emission rate is not suppressed by the size of the macroscopic string. This implies unsuppressed loss of quantum coherence in $(1+1)$-dimensional parent universe.

12 pages, LaTeX, 2 figures (bezier.sty)

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