Nonlocal instantons and solitons in string models

Details Nonlocal instantons and solitons in string models Nonlocal instantons and solitons in string models

2008-02-29

arxiv.org/abs/0802.4395v2

Phys.Lett.B669:102-112,2008

Physics

High Energy Physics

High Energy Physics - Theory

12 pages

Scientific paper

10.1016/j.physletb.2008.09.016

We study a class of nonlocal systems which can be described by a local scalar field diffusing in an auxiliary radial dimension. As examples p-adic, open and boundary string field theory are considered on Minkowski, Friedmann-Robertson-Walker and Euclidean metric backgrounds. Starting from distribution-like initial field configurations which are constant almost everywhere, we construct exact and approximate nonlocal solutions. The Euclidean p-adic lump is interpreted as a solitonic brane, and the Euclidean kink of supersymmetric open string field theory as an instanton. Some relations between solutions of different string theories are highlighted also thanks to a reformulation of nonlocal systems as fixed points in a renormalization group flow.

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