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arXiv 0811.2819math.DGmath.SG
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辛旋量、Holonomy和Maslov指标

Symplectic Spinors, Holonomy and Maslov Index

Andreas Klein

摘要:

本文证明了由Cappell,Lee和Miller引入的拉格朗日路径对的Maslov指数是通过将欧几里得空间上的辛旋或丛(的某个复线-子丛)的元素沿其中的闭合或非闭路拉回到(嵌入的)拉格朗日子流形$L$时,平行输运而出现的.特别地,CLM指数模4确定了这个线丛的和乐群。$L$上的Levi-Civita-联络,因此它的模4的消失等价于平凡化平行截面的存在。此外,它示出的CLM指数确定平行运输在该线束沿任意路径相比,平行运输w.r.t.对于欧几里得空间的正则平坦联络,如果在端点处的拉格朗日切面重合或正交。这是来自平行运输的某些元素的双spinorbundle沿封闭或端点横向路径的结果。

英文摘要:

In this note it is shown that the Maslov Index for pairs of Lagrangian Paths as introduced by Cappell, Lee and Miller appears by parallel transporting elements of (a certain complex line-subbundle of) the symplectic spinorbundle over Euclidean space, when pulled back to an (embedded) Lagrangian submanifold $L$, along closed or non-closed paths therein. In especially, the CLM-Index mod 4 determines the holonomy group of this line bundle w.r.t. the Levi-Civita-connection on $L$, hence its vanishing mod 4 is equivalent to the existence of a trivializing parallel section. Moreover, it is shown that the CLM-Index determines parallel transport in that line-bundle along arbitrary paths when compared to the parallel transport w.r.t. to the canonical flat connection of Euclidean space, if the Lagrangian tangent planes at the endpoints either coincide or are orthogonal. This is derived from a result on parallel transport of certain elements of the dual spinorbundle along closed or endpoint-transversal paths.

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