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arXiv 1701.05044math-phmath.MP
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具有磁链的Dirac算子的谱流

Spectral flow for Dirac operators with magnetic links

Fabian Portmann, Jérémy Sok, Jan Philip Solovej

摘要:

本文研究了具有奇异磁场的三球上Dirac算子的谱性质。对于三维欧氏空间中的Aharonov-Bohm算子,定向纽结所携带的通量具有相应算子的$2π$ -周期性.对于一个给定的链接,从而获得一个家庭的狄拉克运营商的指标环面的通量。我们研究的谱流的路径,这样的运营商对应的循环在这个环面。谱流一般是非平凡的。在特殊情况下的一个环节的unknots,我们推导出一个明确的公式的频谱流的任何回路上的环面的通量。它是根据结的连接数和它们的扭动给出的。

英文摘要:

This paper is devoted to the study of the spectral properties of Dirac operators on the three-sphere with singular magnetic fields supported on smooth, oriented links. As for Aharonov-Bohm solenoids in Euclidean three-space, the flux carried by an oriented knot features a $2π$-periodicity of the associated operator. For a given link one thus obtains a family of Dirac operators indexed by a torus of fluxes. We study the spectral flow of paths of such operators corresponding to loops in this torus. The spectral flow is in general non-trivial. In the special case of a link of unknots we derive an explicit formula for the spectral flow of any loop on the torus of fluxes. It is given in terms of the linking numbers of the knots and their writhes.

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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