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arXiv 0710.0997hep-lat
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动力学重叠费米子的Schwinger模型模拟

Schwinger model simulations with dynamical overlap fermions

Wolfgang Bietenholz, Stanislav Shcheredin, Jan Volkholz

摘要:

我们提出的2味Schwinger模型的动力学重叠费米子的模拟结果。特别是,我们应用重叠超立方体运营商在七个轻费米子质量。在每种情况下,我们收集拓扑扇区0和1中的相当大的统计数据。由于手征凝聚体σ在手征极限中消失,我们观察到微观狄拉克谱的密度,这还没有被随机矩阵理论(RMT)解决。然而,通过面对平均值的最低本征值在不同的拓扑部门与手性RMT在酉系综,我们获得-非常轻的费米子质量-值为西格玛密切遵循的连续分析预测。

英文摘要:

We present simulation results for the 2-flavour Schwinger model with dynamical overlap fermions. In particular we apply the overlap hypercube operator at seven light fermion masses. In each case we collect sizable statistics in the topological sectors 0 and 1. Since the chiral condensate Sigma vanishes in the chiral limit, we observe densities for the microscopic Dirac spectrum, which have not been addressed yet by Random Matrix Theory (RMT). Nevertheless, by confronting the averages of the lowest eigenvalues in different topological sectors with chiral RMT in unitary ensemble we obtain -- for the very light fermion masses -- values for Sigma that follow closely the analytical predictions in the continuum.

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