Covariant variational approach to Yang-Mills theory: Thermodynamics

被引:5
作者
Quandt, M. [1 ]
Reinhardt, H. [1 ]
机构
[1] Univ Tubingen, Inst Theoret Phys, Morgenstelle 14, D-72076 Tubingen, Germany
关键词
LATTICE GAUGE-THEORY; FINITE-TEMPERATURE; QCD; RENORMALIZATION; DECONFINEMENT; CONFINEMENT; PROPAGATORS; GLUON;
D O I
10.1103/PhysRevD.96.054029
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The thermodynamics of SU(2) Yang-Mills theory in the covariant variational approach is studied by relating the free action density in the background of a nontrivial Polyakov loop to the pressure of the gluon plasma. The Poisson resummed expression for the pressure can be evaluated analytically in limiting cases, and shows the correct Stefan-Boltzmann limit at T -> infinity, while the limit T -> 0 is afflicted by artifacts due to massless modes in the confined phase. Several remedies to remove these artifacts are discussed. Using the numerical T = 0 solutions for the ghost and gluon propagators in the covariant variational approach as input, the pressure, energy density and interaction strength are calculated and compared to lattice data.
引用
收藏
页数:15
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