Finite temperature and the Polyakov loop in the covariant variational approach to Yang-Mills Theory

被引：0

作者：

Quandt, Markus ^{[1
]}

Reinhardt, Hugo ^{[1
]}

机构：

[1] Univ Tubingen, Inst Theoret Phys, Morgenstelle 14, D-72076 Tubingen, Germany

来源：

XIITH QUARK CONFINEMENT AND THE HADRON SPECTRUM | 2017年 / 137卷

关键词：

RENORMALIZATION; CONFINEMENT;

D O I：

10.1051/epjconf/201713703017

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We extend the covariant variational approach for Yang-Mills theory in Landau gauge to non-zero temperatures. Numerical solutions for the thermal propagators are presented and compared to high-precision lattice data. To study the deconfinement phase transition, we adapt the formalism to background gauge and compute the effective action of the Polyakov loop for the colour groups SU(2) and SU(3). Using the zero-temperature propagators as input, all parameters are fixed at T=0 and we find a clear signal for a deconfinement phase transition at finite temperatures, which is second order for SU(2) and first order for SU(3). The critical temperatures obtained are in reasonable agreement with lattice data.

引用

页数：9

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