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A hadron's multiquark content reflects itself in the quark composition of theinterpolator with which it has maximal overlap. The AdS/CFT dictionarytranslates the anomalous dimension of this interpolator into a mass correctionfor the corresponding dual mode. Hence such bulk-mass corrections can carryholographic information on multiquark correlations. Two prominent examples arestudied by implementing this robust and universal mechanism into AdS/QCDgravity duals. In the baryon sector bulk-mass corrections are used to describesystematic good (i.e. maximally attractive) diquark effects. The baryon sizesare predicted to decrease with increasing good-diquark content, and the massesof all 48 observed light-quark baryon states are reproduced with unprecedentedaccuracy. Our approach further provides the first holographic description of adominant tetraquark component in the lowest-lying scalar mesons. The tetraquarkground state emerges naturally as the lightest scalar nonet whereas higherexcitations become heavier than their quark--antiquark counterparts and arethus likely to dissolve into the multiparticle continuum.

Multiquark correlations in light mesons and baryons from holographic QCD