Holographic Duals of Long Open Strings
arXiv:0803.3547 · doi:10.1103/PhysRevD.78.026005
Abstract
We study the holographic map between long open strings, which stretch between D-branes separated in the bulk space-time, and operators in the dual boundary theory. We focus on a generalization of the Sakai-Sugimoto holographic model of QCD, where the simplest chiral condensate involves an operator of this type. Its expectation value is dominated by a semi-classical string worldsheet, as for Wilson loops. We also discuss the deformation of the model by this operator, and in particular its effect on the meson spectrum. This deformation can be thought of as a generalization of a quark mass term to strong coupling. It leads to the first top-down holographic model of QCD with a non-Abelian chiral symmetry which is both spontaneously and explicitly broken, as in QCD. Other examples we study include half-supersymmetric open Wilson lines, and systems of D-branes ending on NS5-branes, which can be analyzed using worldsheet methods.
35 pages, 4 figures, harvmac. v2: added references
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- Open Wilson Lines and Chiral Condensates in Thermal Holographic QCD
- Sakai-Sugimoto Brane System at High Density
- Null Melvin Twist to Sakai-Sugimoto model
- Brane-Antibrane Dynamics From the Tachyon DBI Action
- Chiral Condensates in Finite Density Holographic NJL Model from String Worldsheets
- Holographic Dual of QCD from Black D5 Branes
- Intersecting branes and NambuJona-Lasinio model
- AdS/QCD and Type 0 String Theory