D-branes in an asymmetric orbifold

Abstract

We consider the asymmetric orbifold that is obtained by acting with T-duality on a 4-torus, together with a shift along an extra circle. The chiral algebra of the resulting theory has non-trivial outer automorphisms that act as permutations on its simple factors. These automorphisms play a crucial role for constructing D-branes that couple to the twisted sector of the orbifold.

23 pages, harvmac(b); references added

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• Bound-states of D-branes in L-R asymmetric superstring vacua
• Twisted boundary states and representation of generalized fusion algebra
• T-duality Twists and Asymmetric Orbifolds
• Tensor Product and Permutation Branes on the Torus
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• Permutation Orientifolds of Gepner Models
• Permutation Orientifolds
• From Twists and Shifts to L-R asymmetric D-branes
• BPS branes in discrete torsion orbifolds
• DBI analysis of generalised permutation branes
• Quasi-Hamiltonian bookkeeping of WZNW defects