145 citations
- Universitat de BarcelonaES2 papers
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- Aarhus UniversityDK1 paper
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- Laboratoire de Physique Théorique et Hautes EnergiesFR1 paper
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6 papers · 1 filter
On small tension p-branes
Jonas Bjornsson, Stephen Hwang
This paper deals with p-branes with small but non-zero tension. We prove the existence of canonical transformations, within a perturbation theory, that link specific geometries of…
On the unitarity of gauged non-compact WZNW strings
Jonas Bjornsson, Stephen Hwang
In this paper we investigate the unitarity of gauged non-compact WZNW strings i.e. string theories formulated as G/H' WZNW models, where G is a non-compact group. These models repr…
Topological defects for the free boson CFT
Jürgen Fuchs, Matthias R. Gaberdiel, Ingo Runkel +1
Two different conformal field theories can be joined together along a defect line. We study such defects for the case where the conformal field theories on either side are single f…
Bi-branes: Target Space Geometry for World Sheet topological Defects
Jürgen Fuchs, Christoph Schweigert, Konrad Waldorf
We establish that the relevant geometric data for the target space description of world sheet topological defects are submanifolds - which we call bi-branes - in the product M1 x M…
On the cohomology and inner products of the Berkovits superparticle and superstring
Michael Chesterman
We describe the complete cohomology of the Berkovits BRST operator for the superparticle. It is non-zero at eight ghost numbers, splitting into two quartets, the members of each qu…
D-branes in lens spaces
P. Bordalo, A. Wurtz
We realize the CFT with target a lens space SU(2)/Z_l as a simple current construction. This allows us to compute the boundary states and the annuli coefficients, and in particular…