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Squashed giants: bound states of giant gravitons

Sergey Prokushkin1 and Mohammad M. Sheikh-Jabbari1

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We consider giant gravitons in the maximally supersymmetric type-IIB plane-wave, in the presence of a constant NSNS B-field background. We show that in response to the background B-field the giant graviton would take the shape of a deformed three-sphere, the size and shape of which depend on the B-field, and that the giant becomes classically unstable once the B-field is larger than a critical value Bcr. In particular, for the B-field which is (anti-)self-dual under the SO(4) isometry of the original giant S3, the closed string metric is that of a round S3, while the open string metric is a squashed three-sphere. The squashed giant can be interpreted as a bound state of a spherical three-brane and circular D-strings. We work out the spectrum of geometric fluctuations of the squashed giant and study its stability. We also comment on the gauge theory which lives on the brane (which is generically a noncommutative theory) and a possible dual gauge theory description of the deformed giant.


Keywords

AdS-CFT and dS-CFT Correspondence

Penrose limit and pp-wave background

D-branes

 

E-print Number: hep-th/0406053

Cited: by |

Refers: to

PACS

04.60.-m Quantum gravity

11.25.Uv D branes

11.15.-q Gauge field theories

11.30.Pb Supersymmetry

Subjects

Gravitation and cosmology

Particle physics and field theory

Dates

Issue 07 (July 2004)

Received 15 June 2004, accepted for publication 29 July 2004

Published 3 September 2004



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