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arXiv 1202.0929hep-lat
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SU中心涡旋背景下拓扑荷确定的临界分析(2)格点规范理论

Critical analysis of topological charge determination in the background of center vortices in SU(2) lattice gauge theory

R. Höllwieser, M. Faber, U. M. Heller

摘要:

我们使用不同的拓扑荷定义,即拓扑荷的中心涡图、FF在元胞和超立方体定义中的离散形式以及格点指数定理,分析了平面和球面形状的经典SU(2)中心涡的拓扑荷贡献.对于后者,狄拉克算子的零模的基本和伴随表示使用重叠和asqtad交错费米子配方进行了研究。我们发现个别定义的几个问题,并讨论不同的拓扑电荷定义之间的差异。我们的结果表明,在中心涡的背景下的拓扑荷的解释是相当微妙的。

英文摘要:

We analyze topological charge contributions from classical SU(2) center vortices with shapes of planes and spheres using different topological charge definitions, namely the center vortex picture of topological charge, a discrete version of FF in the plaquette and hypercube definitions and the lattice index theorem. For the latter the zeromodes of the Dirac operator in the fundamental and adjoint representations using both the overlap and asqtad staggered fermion formulations are investigated. We find several problems for the individual definitions and discuss the discrepancies between the different topological charge definitions. Our results show that the interpretation of topological charge in the background of center vortices is rather subtle.

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