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Diagonal D-branes in product spaces and their Penrose limits

Gor Sarkissian1 and Marija Zamaklar1

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We study classes of D-branes embedded in various AdS m × S n × S p × T q backgrounds, which nontrivially mix the target-space submanifolds. Mixing is achieved either via diagonal geometric embedding or through a mixed worldvolume flux which has one index in the sphere and one index in the AdS part. Branes of the former type wrap calibrated cycles in the target space, while those of the latter type wrap non-supersymmetric target space cycles which are stabilised only after the mixed worldvolume flux is turned on. In the second part of the paper we study two qualitatively different Penrose limits of these diagonal branes. In the first case we look at geodesics which do not belong to the worldvolume of brane. In order to get a nontrivial result, one needs to bring the brane closer and closer to the geodesic while taking the limit. The result is a D-brane with a worldvolume relativistic pulse. In the second case the Penrose geodesic belongs to the worldvolume and the resulting brane is of the ``oblique'' type: it is diagonally embedded between different SO groups of the target space pp-wave.


Keywords

Penrose limit and pp-wave background

D-branes

 

E-print Number: hep-th/0308174

Cited: by |

Refers: to

PACS

11.25.Uv D branes

11.27.+d Extended classical solutions; cosmic strings, domain walls, texture

Subjects

Particle physics and field theory

Dates

Issue 03 (March 2004)

Received 11 January 2004, accepted for publication 1 March 2004

Published 29 March 2004



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