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arXiv 1302.6458hep-lat
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重叠费米子探测QCD真空的拓扑和磁性

Topological and magnetic properties of the QCD vacuum probed by overlap fermions

V. V. Braguta, P. V. Buividovich, T. Kalaydzhyan, M. I. Polikarpov

摘要:

在猝灭格点规范理论下,利用重叠费米子研究了非阿贝尔真空的定域CP奇性和磁性。这些性质包括:SU(2)胶子动力学中拓扑电荷密度(无质量费米子的手征性)的不均匀空间分布(对于非冷却规范组态,手征性位于d=2的低维缺陷上)。3,而一系列的冷却步骤产生四维瞬子,从而产生手征分布的四维结构);手征的有限局域涨落随外磁场的强度而增长; SU(3)理论中QCD真空的磁化和磁化率;手征对称性破缺的磁催化作用,以及强磁场中QCD真空的导电性。

英文摘要:

We study some of the local CP-odd and magnetic properties of the non-Abelian vacuum with use of overlap fermions within the quenched lattice gauge theory. Among these properties are the following: inhomogeneous spatial distribution of the topological charge density (chirality for massless fermions) in SU(2) gluodynamics (for uncooled gauge configurations the chirality is localized on low-dimensional defects with d=2..3, while a sequence of cooling steps gives rise to four-dimensional instantons and hence a four-dimensional structure of the chirality distribution); finite local fluctuations of the chirality growing with the strength of an external magnetic field; magnetization and susceptibility of the QCD vacuum in SU(3) theory; magnetic catalysis of the chiral symmetry breaking, and the electric conductivity of the QCD vacuum in strong magnetic fields.

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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