Stability Conditions For Topological D-branes: A Worldsheet Approach

Details Stability Conditions For Topological D-branes: A Worldsheet Approach Stability Conditions For Topological D-branes: A Worldsheet Approach

2003-11-12

arxiv.org/abs/hep-th/0311101v1

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, latex

Scientific paper

We study conditions on the topological D-branes of types A and B obtained by requiring a proper matching of the spectral flow operators on the boundary. These conditions ensure space-time supersymmetry and stability of D-branes. In most cases, we reproduce the results of Marino-Minasian-Moore-Strominger, who studied the same problem using the supersymmetric Born-Infeld action. In some other cases, corresponding to coisotropic A-branes, our stability condition is new. Our results enable us to define an analogue of the Maslov class and grading for coisotropic A-branes. We expect that they play a role in a conjectural generalization of the Floer homology.

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