Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-11-21
JHEP0604:058,2006
Physics
High Energy Physics
High Energy Physics - Theory
24 pages; JHEP style; Final version
Scientific paper
10.1088/1126-6708/2006/04/058
We complete the study of the Poisson-Sigma model over Poisson-Lie groups. Firstly, we solve the models with targets $G$ and $G^*$ (the dual group of the Poisson-Lie group $G$) corresponding to a triangular $r$-matrix and show that the model over $G^*$ is always equivalent to BF-theory. Then, given an arbitrary $r$-matrix, we address the problem of finding D-branes preserving the duality between the models. We identify a broad class of dual branes which are subgroups of $G$ and $G^*$, but not necessarily Poisson-Lie subgroups. In particular, they are not coisotropic submanifolds in the general case and what is more, we show that by means of duality transformations one can go from coisotropic to non-coisotropic branes. This fact makes clear that non-coisotropic branes are natural boundary conditions for the Poisson-Sigma model.
Calvo Ivan
Falceto Fernando
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