Journal
PHYSICS LETTERS B
Volume 669, Issue 1, Pages 102-106Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2008.09.016
Keywords
Nonlocal theories; p-adic string; String field theory
Funding
- Marie Curie Intra-European Fellowship [MEIF-CT-2006-024523]
- INFN of Italy
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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. (C) 2008 Elsevier B.V. All rights reserved.
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