arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1306.4198hep-thmath.KTmath.OA
收藏

非交换几何上圆丛的T-对偶

T-duality for circle bundles via noncommutative geometry

Varghese Mathai, Jonathan Rosenberg

摘要:

最近Baraglia表明如何拓扑T-对偶可以扩展到不仅适用于主圆丛,而且还适用于非主圆丛。我们表明,他的结果也可以通过其他两种方法恢复:同伦理论的方法邦克和希克,和非交换几何方法,我们以前使用的主环面束。这项工作有几个有趣的副产品,包括Isom(R)对交叉积的K-理论的研究,O(2)的泛覆盖,以及关于Z/2的等变K-理论的一些有趣事实。在本文的最后一节中,这些结果被推广到具有奇异纤维的丛的情形,即非自由O(2)作用的情形。

英文摘要:

Recently Baraglia showed how topological T-duality can be extended to apply not only to principal circle bundles, but also to non-principal circle bundles. We show that his results can also be recovered via two other methods: the homotopy-theoretic approach of Bunke and Schick, and the noncommutative geometry approach which we previously used for principal torus bundles. This work has several interesting byproducts, including a study of the K-theory of crossed products by Isom(R), the universal cover of O(2), and some interesting facts about equivariant K-theory for Z/2. In the final section of this paper, these results are extended to the case of bundles with singular fibers, or in other words, non-free O(2)-actions.

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。

↑