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arXiv 0811.3710math.DG
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任意符号的自然共形不变量子化的存在性

Existence of natural and conformally invariant quantizations of arbitrary symbols

Pierre Mathonet, Fabian Radoux

摘要:

流形上的量子化可以看作是构造具有指定主象征的微分算子的一种方法。此外,量化映射需要是线性双射。众所周知,通常没有自然的量化过程。然而,考虑到流形赋予了额外的结构,如投影或伪共形结构,人们可以寻求依赖于这个额外的结构的量化,如果考虑到相对于结构的依赖性,这是自然的。这个问题的存在,这样的量化是解决了一系列文件的背景下,射影几何,使用的框架内的萨拉斯-怀特海连接(见Bordemann,Hansoul和福克斯)。最近,我们恢复了这些存在性结果,使用Cartan投射联系的理论。在目前的工作中,我们表明,我们的方法可以适应伪共形几何产生所谓的自然和共形不变的量化任意符号,仍然在一些关键的情况。我们的方法是一般的,足以分析问题的不变量子化的背景下,流形不可约抛物几何。

英文摘要:

A quantization over a manifold can be seen as a way to construct a differential operator with prescribed principal symbol. The quantization map is moreover required to be a linear bijection. It is known that there is in general no natural quantization procedure. However, considering manifolds endowed with additional structures, such as projective or pseudo-conformal structures, one can seek for quantizations that depend on this additional structure and that are natural if the dependence with respect to the structure is taken into account. The question of existence of such a quantization was addressed in a series of papers in the context of projective geometry, using the framework of Thomas-Whitehead connections (see Bordemann, Hansoul and Fox). Recently, we recovered these existence results, using the theory of Cartan projective connections. In the present work, we show that our method can be adapted to pseudo-conformal geometry to yield the so-called natural and conformally invariant quantization for arbitrary symbols, still outside some critical situations. Our method is general enough to analyze the problem of invariant quantizations in the context of manifolds with irreducible parabolic geometries.

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