Topological Sigma Models with H-Flux
| Autor: | Hull, C. M., Lindstrom, U., Santos, L. Melo dos, von Unge, R., Zabzine, M. |
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| Rok vydání: | 2008 |
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| Zdroj: | JHEP 0809:057,2008 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1126-6708/2008/09/057 |
| Popis: | We investigate the topological theory obtained by twisting the N=(2,2) supersymmetric nonlinear sigma model with target a bihermitian space with torsion. For the special case in which the two complex structures commute, we show that the action is a Q-exact term plus a quasi-topological term. The quasi-topological term is locally given by a closed two-form which corresponds to a flat gerbe-connection and generalises the usual topological term of the A-model. Exponentiating it gives a Wilson surface, which can be regarded as a generalization of a Wilson line. This makes the quantum theory globally well-defined. Comment: 16 pages, Appendix added, the version to appear in JHEP |
| Databáze: | arXiv |
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