Index theorem in spontaneously symmetry-broken gauge theories on a fuzzy 2-sphere

Index theorem in spontaneously symmetry-broken gauge theories on a fuzzy 2-sphere
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模糊2-球面上自发对称破缺规范理论中的指数定理

DOI:
10.1103/physrevd.78.025028
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发表时间:
2008
期刊:
影响因子:
5
通讯作者:
S. Iso
S. Iso
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
H. Aoki;Y. Hirayama;S. Iso

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我们考虑模糊2-球面上的规范-Higgs系统,研究了当U(2)规范对称性被Higgs场的VEV自发破缺到U(1)Xu(1)时规范组态的拓扑结构。根据满足Ginsparg-Wilson关系的Dirac算符的指数对拓扑进行分类,证明了它是由Hooft引入的拓扑荷的非对易模拟.它可以改写为其交换极限成为Higgs场的缠绕数的形式.我们还研究了保证公式有效性的条件,并给出了可容许性条件的推广.最后,我们显式地计算了单参数构型族的拓扑荷.
We consider a gauge-Higgs system on a fuzzy 2-sphere and study the topological structure of gauge configurations, when the U(2) gauge symmetry is spontaneously broken to U(1)xU(1) by the vev of the Higgs field. The topology is classified by the index of the Dirac operator satisfying the Ginsparg-Wilson relation, which turns out to be a noncommutative analog of the topological charge introduced by 't Hooft. It can be rewritten as a form whose commutative limit becomes the winding number of the Higgs field. We also study conditions which assure the validity of the formulation, and give a generalization of the admissibility condition. Finally we explicitly calculate the topological charge of a one-parameter family of configurations.
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DOI: --
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影响因子: --
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