Citation
Li, Yi (2005) Topological Sigma Models and Generalized Geometries. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/RMHE-4185. https://resolver.caltech.edu/CaltechETD:etd-05262005-154458
Abstract
We study the relation between topological sigma models and generalized geometries. The existence conditions for the most general type of topological sigma models obtained from twisting the N=(2,2) supersymmetric sigma model are investigated, and are found to be related to twisted generalized Calabi-Yau structures. The properties of these topological sigma models are analyzed in detail. The observables are shown to be described by the cohomology of a Lie algebroid, which is intrinsically associated with the twisted generalized Calabi-Yau structure. The Frobenius structure on the space of states and the effects of instantons are analyzed. We also study D-branes in these topological sigma models, and demonstrate that they also admit descriptions in terms of generalized geometries.
| Item Type: | Thesis (Dissertation (Ph.D.)) |
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| Subject Keywords: | D-brane; differential geometry; generalized geometry; sigma model; topological field theory |
| Degree Grantor: | California Institute of Technology |
| Division: | Physics, Mathematics and Astronomy |
| Major Option: | Physics |
| Thesis Availability: | Public (worldwide access) |
| Research Advisor(s): |
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| Group: | Caltech Theory |
| Thesis Committee: |
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| Defense Date: | 18 May 2005 |
| Record Number: | CaltechETD:etd-05262005-154458 |
| Persistent URL: | https://resolver.caltech.edu/CaltechETD:etd-05262005-154458 |
| DOI: | 10.7907/RMHE-4185 |
| Default Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
| ID Code: | 2098 |
| Collection: | CaltechTHESIS |
| Deposited By: | Imported from ETD-db |
| Deposited On: | 02 Jun 2005 |
| Last Modified: | 01 Jul 2025 16:24 |
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