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arXiv 1012.3860math-phhep-thmath.MPmath.QA
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Dirac算子标量扰动的谱action

Spectral action for scalar perturbations of Dirac operators

Andrzej Sitarz, Artur Zajac

摘要:

研究了Dirac算子受标函数扰动的奇维黎曼自旋流形谱作用量的首项。我们计算了前两个Gilkey-de Witt系数,并对具有完全对称Dirac的$n$ -球的情形进行了显式计算。在3维的特殊情况下,当这种扰动对应于完全反对称挠率时,我们按照Chamseddine和Connes的方法进行了非对易计算,并研究了$SU_q(2)$的情形.

英文摘要:

We investigate the leading terms of the spectral action for odd-dimensional Riemannian spin manifolds with the Dirac operator perturbed by a scalar function. We calculate first two Gilkey-de Witt coefficients and make explicit calculations for the case of $n$-spheres with a completely symmetric Dirac. In the special case of dimension 3, when such perturbation corresponds to the completely antisymmetric torsion we carry out the noncommutative calculation following Chamseddine and Connes and study the case of $SU_q(2)$.

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