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arXiv 0802.2496hep-lathep-phhep-th
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Weyl费米子的新重叠结构

New overlap construction of Weyl fermions

Christof Gattringer, Markus Pak

摘要:

在最近的一篇文章中,Hasenfratz和von Allmen提出了规范群为SU(2)的格点上两种类型的外尔费米子的不动点作用量。他们使用的块自旋变换将基础矢量理论的手征和矢量对称性映射到两个Ginsparg-Wilson(GW)类型的方程上。我们表明,重叠狄拉克运营商可以同时解决两个GW方程。我们讨论了这种重叠算符的性质及其在格点Weyl费米子上的投影,特别是投影算符与规范场无关。

英文摘要:

In a recent article Hasenfratz and von Allmen have suggested a fixed point action for two flavors of Weyl fermions on the lattice with gauge group SU(2). The block-spin transformation they use maps the chiral and vector symmetries of the underlying vector theory onto two equations of the Ginsparg-Wilson (GW) type. We show that an overlap Dirac operator can be constructed which solves both GW equations simultaneously. We discuss the properties of this overlap operator and its projection onto lattice Weyl fermions which seems to be free of artefacts, in particular the projection operators are independent of the gauge field.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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