引力异常的拓扑解释
On the Topological Interpretation of Gravitational Anomalies
摘要:
我们认为混合引力杨-米尔斯反常是$C^*$ -代数交叉积的$K$ -理论与$K$ -同调之间的耦合。Connes-Moscovici的指数定理允许通过包含联络和曲率的局部公式计算$K$ -圈的Chern特征标。它给出了一个拓扑解释的异常,在这个意义上的非交换代数。
英文摘要:
We consider the mixed gravitational-Yang-Mills anomaly as the coupling between the $K$-theory and $K$-homology of a $C^*$-algebra crossed product. The index theorem of Connes-Moscovici allows to compute the Chern character of the $K$-cycle by local formulae involving connections and curvatures. It gives a topological interpretation to the anomaly, in the sense of noncommutative algebras.
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