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Search of QCD phase transition points in the canonical approach of the NJL model

NJL模型のカノニカル法によるQCD相転移点の探索

若山 将征*; 保坂 淳

Wakayama, Masayuki*; Hosaka, Atsushi

We study the Lee-Yang zeros in the canonical approach to search phase transition points at finite temperature and density in the Nambu-Jona-Lasinio (NJL) model as an effective model of QCD. The canonical approach is a promising method to avoid the sign problem in lattice QCD at finite density. We find that a set of Lee-Yang zeros computed with finite degrees of freedom can be extrapolated to those with infinite degrees of freedom, providing the correct phase transition point. We propose the present method as a useful method for actual lattice simulations for QCD.

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