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The geometry of WZW branes
Karlstads universitet, Fakulteten för teknik- och naturvetenskap, Avdelningen för fysik och elektroteknik.ORCID-id: 0000-0003-4081-6234
2000 (engelsk)Inngår i: Journal of Geom. and Physics 34 (2000)Artikkel i tidsskrift (Fagfellevurdert)
Abstract [en]

The structures in target space geometry that correspond to conformally invariant boundary conditions in WZW theories are determined both by studying the scattering of closed string states and by investigating the algebra of open string vertex operators. In the limit of large level, we find branes whose world volume is a regular conjugacy class or, in the case of symmetry breaking boundary conditions, a `twined' version thereof. In particular, in this limit one recovers the commutative algebra of functions over the brane world volume, and open strings connecting different branes disappear. At finite level, the branes get smeared out, yet their approximate localization at (twined) conjugacy classes can be detected unambiguously.

As a by-product, it is demonstrated how the pentagon identity and tetrahedral symmetry imply that in any rational conformal field theory the structure constants of the algebra of boundary operators coincide with specific entries of fusing matrices

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2000.
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URN: urn:nbn:se:kau:diva-24459OAI: oai:DiVA.org:kau-24459DiVA, id: diva2:598226
Tilgjengelig fra: 2013-01-22 Laget: 2013-01-22 Sist oppdatert: 2014-11-21

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http://dx.doi.org/10.1016/S0393-0440(99)00061-3http://xxx.lanl.gov/abs/hep-th/9909030

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Fuchs, Jürgen

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