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Holographic Studies of Strongly Coupled Systems at Large Density

초록/요약

We use the holographic technique to study the response functions of dense, heavy fundamental matter coupled to SU(Nc) super Yang-Mills theory at finite temperature above the deconfinement phase transition but below the scale set by the baryon number density. By studying the current-current correlators of the baryon number density, we explored various properties, such as the AC conductivity, the quasi-particle spectrum and the Drude-limit parameters like the relaxation time. We employ a scaling behaviour in the dual geometry which depends in this limit only on the mass-squared to density ratio and obtain relatively simple temperature-independent closed-form expressions. We concentrated on the (2+1)-dimensional defect case, but in principle our results can also be generalized straightforwardly to other cases.

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