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arXiv 0909.5252hep-thhep-lat
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利用Ginsparg-Wilson关系构造模糊S^2 × S^2上的拓扑荷

Construction of a topological charge on fuzzy S^2 x S^2 via Ginsparg-Wilson relation

Hajime Aoki, Yoshiko Hirayama, Satoshi Iso

摘要:

利用满足Ginsparg-Wilson关系的Dirac算子,构造了模糊S^2 × S^2上规范场组态的拓扑荷.定义在模糊S^2xS^2上的拓扑荷可以解释为S^2xS^2上第二个陈特征标的非交换(或矩阵)推广。我们进一步计算了拓扑非平凡规范组态中狄拉克算符手征零模的数目。我们的公式的推广模糊(S^2)^k也进行了讨论。

英文摘要:

We construct a topological charge of gauge field configurations on a fuzzy S^2xS^2 by using a Dirac operator satisfying the Ginsparg-Wilson relation. The topological charge defined on the fuzzy S^2xS^2 can be interpreted as a noncommutative (or matrix) generalization of the 2nd Chern character on S^2xS^2. We further calculate the number of chiral zero modes of the Dirac operator in topologically nontrivial gauge configurations. Generalizations of our formulation to fuzzy (S^2)^k are also discussed.

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