Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-11-01
Phys.Rev.D65:085019,2002
Physics
High Energy Physics
High Energy Physics - Theory
25 pages, latex
Scientific paper
10.1103/PhysRevD.65.085019
We construct a supergravity dual to the cascading $SU(N+M) x SU(N)$ supersymmetric gauge theory (related to fractional D3-branes on conifold according to Klebanov et al) in the case when the 3-space is compactified on $S^3$ and in the phase with unbroken chiral symmetry. The size of $S^3$ serves as an infrared cutoff on the gauge theory dynamics. For a sufficiently large $S^3$ the dual supergravity background is expected to be nonsingular. We demonstrate that this is indeed the case: we find a smooth type IIB supergravity solution using a perturbation theory that is valid when the radius of $S^3$ is large. We consider also the case with the euclidean world-volume being $S^4$ instead of $R x S^3$, where the supergravity solution is again found to be regular. This ``curved space'' resolution of the singularity of the fractional D3-branes on conifold solution is analogous to the one in the non-extremal (finite temperature) case discussed in our previous work.
Buchel Alex
Tseytlin Arkady A.
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