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arXiv 0710.2799hep-lat
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用重叠费米子和改进的action研究T > 0时SU(2)的拓扑真空结构

Study of the topological vacuum structure of SU(2) gluodynamics at T > 0 with overlap fermions and improved action

V. G. Bornyakov, E. V. Luschevskaya, S. M. Morozov, M. I. Polikarpov, E. M. Ilgenfritz, M. Muller-Preussker

摘要:

我们研究了有限温度下SU(2)在退细化相变附近的胶子动力学。我们使用蝌蚪改进的Luscher-Weisz作用来创建晶格系综。利用重叠狄拉克算符确定了真空结构的以下三个方面:(i)在不同温度下计算了相变的拓扑磁化率;(ii)确定了重叠费米子谱密度,发现它依赖于相变上方的Polyakov环;(iii)研究了低本征模的相应局域化性质。

英文摘要:

We study SU(2) gluodynamics at finite temperature near the deconfining phase transition. We create the lattice ensembles using the tadpole improved Luscher-Weisz action. The overlap Dirac operator is used to determine the following three aspects of vacuum structure: (i) The topological susceptibility is evaluated at various temperatures across the phase transition, (ii) the overlap fermion spectral density is determined and found to depend on the Polyakov loop above the phase transition and (iii) the corresponding localization properties of low lying eigenmodes are investigated.

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