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arXiv 0710.0401hep-lat
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局域重叠本征模对RMT测量和拓扑的影响

The impact of localized overlap eigenmodes on RMT measurements and topology

Anna Hasenfratz, Roland Hoffmann, Stefan Schaefer

摘要:

连续介质QCD Dirac算符的低能本征模被推广,但在晶格上,由于离散效应,Dirac算符可以有局域本征模。这些非物理模式可以为对手征对称性敏感的可观测量引入强的晶格伪影,特别是在混合作用模拟中。我们研究了这些晶格伪影如何依赖于重叠算子的参数,以及它们对狄拉克本征模和拓扑磁化率分布的影响。

英文摘要:

The low energy eigenmodes of the continuum QCD Dirac operator are extended, but on the lattice, due to discretization effects, the Dirac operator can have localized eigenmodes. These non-physical modes can introduce strong lattice artifacts for observables that are sensitive to chiral symmetry, especially in mixed action simulations. We study how these lattice artifacts depend on the parameters of the overlap operator and their affect on the distribution on the Dirac eigenmodes and the topological susceptibility.

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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