Scaling of cosmic string loops

Vitaly Vanchurin, Ken D. Olum, Alexander Vilenkin

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140 Scopus citations


We study the spectrum of loops as a part of a complete network of cosmic strings in flat spacetime. After a long transient regime, characterized by production of small loops at the scale of the initial conditions, it appears that a true scaling regime takes over. In this final regime the characteristic length of loops scales as 0.1t, in contrast to earlier simulations which found tiny loops. We expect the expanding-universe behavior to be qualitatively similar. If this expectation is correct, then the large loop sizes have important cosmological implications. In particular, the nucleosynthesis bound then becomes Gμ10-7, much tighter than that obtained from earlier analyses.

Original languageEnglish (US)
Article number063527
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number6
StatePublished - 2006


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