D-branes on T4/Z2 and T-Duality
Ilka Brunner, Rami Entin, Christian Romelsberger
Abstract
In this note we discuss D-branes on T4/Z2 using the boundary states formalism. Explicit formulas for the untwisted boundary states inherited from the underlying T4 and twisted states corresponding to branes wrapping collapsed 2-cycles at the orbifold singularities are given. The exact CFT description of the orbifold makes it possible to study how the boundary states transform under Ri -> 1/Ri transformation on all directions of the underlying T4. We compare their transformation law with results obtained from world volume considerations.
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