Dilatonic Repulsons and Confinement via the AdS/CFT Correspondence

Details Dilatonic Repulsons and Confinement via the AdS/CFT Correspondence Dilatonic Repulsons and Confinement via the AdS/CFT Correspondence

2004-03-25

arxiv.org/abs/hep-th/0403249v3

Phys.Rev. D70 (2004) 086004

Physics

High Energy Physics

High Energy Physics - Theory

26 pages, 9 figures, Discussion of mass gap added, Refs added, version for the publication

Scientific paper

10.1103/PhysRevD.70.086004

We study a class of dilatonic deformations of asymptotically AdS_5 X S^5 geometry analytically and numerically. The spacetime is non-supersymmetric and suffers from a naked singularity. We propose that the causality bound may serve as a criterion for such a geometry with a naked singularity to still make sense in the AdS/CFT correspondence. We show that the static string, the one corresponding to a large Wilson loop in the dual gauge theory, reveals confinement in a certain range of parameters of our solutions, where the singularity exhibits the repulsion that can well cloak the singularity from the static string probe. In particular, we find the exact expression for the tension of the QCD strings. We also discuss a possible interpretation of our solution in terms of unstable branes and their tachyon matter.

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