Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-06-07
JHEP 0407:077,2004
Physics
High Energy Physics
High Energy Physics - Theory
Latex file, 32 pages, 6 .eps figures; v3: typos corrected
Scientific paper
10.1088/1126-6708/2004/07/077
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 B_{cr}. In particular, for the B-field which is (anti-)self-dual under the SO(4) isometry of the original giant S^3, the closed string metric is that of a round S^3, 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.
Prokushkin Sergey
Sheikh-Jabbari Mohammad M.
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