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arXiv math-ph/0506024math-phmath.MP
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物理学和非交换几何中的李群胚和李代数胚

Lie Groupoids and Lie algebroids in physics and noncommutative geometry

N. P. Landsman

摘要:

这篇评论文章的目的是解释李群胚和李代数胚对物理学家和非对易几何学家的相关性。群胚推广了群、空间、群作用和等价关系。这最后一个方面在非交换几何中占主导地位,其中群胚提供了去奇异化病态商空间的基本工具。然而,在物理学中,群胚的主要作用是提供内部和外部对称性的统一描述。非对易几何和物理学的共同点是康纳斯将C*-代数C*(G)与李群胚G联系起来的思想的重要性:在非对易几何中,C*(G)用适当的非对易空间代替给定的奇异商空间,而在物理学中,它给出了量子系统的可观测量的代数,其对称性由G编码。此外,Connes的映射G -> C*(G)在辛几何中有一个经典的类似物G -> A*(G),这是由于Weinstein,它定义了相应经典系统的Poisson流形作为李群胚G的所谓李代数胚A(G)的对偶,李群胚G是李代数和切丛的推广对象。这也将导致辛群胚和量子化的代数泛函。

英文摘要:

The aim of this review paper is to explain the relevance of Lie groupoids and Lie algebroids to both physicists and noncommutative geometers. Groupoids generalize groups, spaces, group actions, and equivalence relations. This last aspect dominates in noncommutative geometry, where groupoids provide the basic tool to desingularize pathological quotient spaces. In physics, however, the main role of groupoids is to provide a unified description of internal and external symmetries. What is shared by noncommutative geometry and physics is the importance of Connes's idea of associating a C*-algebra C*(G) to a Lie groupoid G: in noncommutative geometry C*(G) replaces a given singular quotient space by an appropriate noncommutative space, whereas in physics it gives the algebra of observables of a quantum system whose symmetries are encoded by G. Moreover, Connes's map G -> C*(G) has a classical analogue G -> A*(G) in symplectic geometry due to Weinstein, which defines the Poisson manifold of the corresponding classical system as the dual of the so-called Lie algebroid A(G) of the Lie groupoid G, an object generalizing both Lie algebras and tangent bundles. This will also lead into symplectic groupoids and the conjectural functoriality of quantization.

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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