# Dynamical Instability of Holographic QCD at Finite Density - High Energy Physics - Theory

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Abstract: In this paper we study the dynamical instability of Sakai-Sugimoto-sholographic QCD model at finite baryon density. In this model, the baryondensity, represented by the smeared instanton on the worldvolume of the probeD8-\overline{D8} mesonic brane, sources the worldvolume electric field, andthrough the Chern-Simons term it will induces the instability to form a chiralhelical wave. This is similar to Deryagin-Grigoriev-Rubakov instability to formthe chiral density wave for large N c QCD at finite density. Our results showthat this kind of instability occurs for sufficiently high baryon numberdensities. The phase diagram of holographic QCD will thus be changed from theone which is based only on thermodynamics. This holographic approach providesan effective way to study the phases of QCD at finite density, where theconventional perturbative QCD and lattice simulation fail.

Autor: Wu-yen Chuang, Shou-Huang Dai, Shoichi Kawamoto, Feng-Li Lin, Chen-Pin Yeh

Fuente: https://arxiv.org/