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arXiv 0909.2023math.SGmath-phmath.DGmath.MP
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关于切触流形的几何量子化

On the geometric quantization of contact manifolds

Sean Fitzpatrick

摘要:

假设$(M,E)$是一个紧接触流形,并且紧李群$G$作用在$M$上,横切于接触分布$E$。在以前的文章中,我们定义了一个$G$ -横截椭圆Dirac算子$\dirac$,它是利用辛向量丛$E\rightarrow M$上的Hermitian度量$h$和联络$\nabla$构造的,它的等变指数被很好地定义为$G$上的一个广义函数,并给出了它的指数公式.与辛流形的几何量子化类似,$\mathbb{Z}_2$ -分次希尔伯特空间$Q(M)=\ker \dirac \oplus \ker \dirac^{*}$可以解释为接触流形$(M,E)$的“量子化”;相应的虚$G$ -表示的特征则由$\dirac$的等变指数给出。通过定义接触类似物的代数的观测量,前量子线丛和极化,我们进一步扩展的类比,给出一个接触版本的Kostant-Souriau方法的量化,并讨论在何种程度上,这种方法是复制的指数理论方法。

英文摘要:

Suppose that $(M,E)$ is a compact contact manifold, and that a compact Lie group $G$ acts on $M$ transverse to the contact distribution $E$. In an earlier paper, we defined a $G$-transversally elliptic Dirac operator $\dirac$, constructed using a Hermitian metric $h$ and connection $\nabla$ on the symplectic vector bundle $E\rightarrow M$, whose equivariant index is well-defined as a generalized function on $G$, and gave a formula for its index. By analogy with the geometric quantization of symplectic manifolds, the $\mathbb{Z}_2$-graded Hilbert space $Q(M)=\ker \dirac \oplus \ker \dirac^{*}$ can be interpreted as the "quantization" of the contact manifold $(M,E)$; the character of the corresponding virtual $G$-representation is then given by the equivariant index of $\dirac$. By defining contact analogues of the algebra of observables, pre-quantum line bundle and polarization, we further extend the analogy by giving a contact version of the Kostant-Souriau approach to quantization, and discussing the extent to which this approach is reproduced by the index-theoretic method.

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