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We calculate the one-point function of certain chiral operators, known asopen Wilson lines, in the holographic Nambu-Jona-Lasinio (NJL) model at finitetemperature as well as finite chemical potential for quark (baryon) numberdensity. These operators are holographically dual to Euclidean stringworldsheets bounded by the flavor branes. Their one-point functions can serveas order parameters for chiral symmetry breaking in these models. Analyzing thebehavior of the dual string worldsheets with respect to temperature andchemical potential (or quark density) enables us to determine how the orderparameter depends on these parameters.

Chiral Condensates in Finite Density Holographic NJL Model from String Worldsheets