Probing Wilson loops in AdS/QCD

We use AdS/QCD to analyze the quark and gluon scalar and pseudoscalar condensates around static color sources described by a circular Wilson loop. We also derive the static dipole-dipole interactions between rectangular Wilson loops in AdS/QCD and discuss their relevance for static string interactions in QCD at strong coupling.

Figure 1

Circular Wilson loop probed by $X\equiv ⟨\overline{q}q⟩$ at the boundary. See the text.

Figure 2

Static dipole-dipole interactions: $\mathrm{\Phi }\mathrm{\Phi }$ exchange (left), $\mathrm{\Phi }F$ exchange (middle), and $FF$ exchange (right). See the text.