arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0711.4085hep-th
收藏

广义阿贝尔规范理论中的泛函积分和规范二义性

Functional integration and gauge ambiguities in generalized abelian gauge theories

Gerald Kelnhofer

摘要:

本文研究了n维紧致闭流形上广义阿贝尔规范理论的协变量子化,该流形的规范不变场空间是Cheeger-Simons微分特征标的阿贝尔群.证明了规范场空间是光滑Cheeger-Simons微分特征标子群轨道上的非平凡丛。此外,每个轨道本身具有多维环面上的丛的结构。因此,存在一个拓扑障碍的整体规范固定条件的存在。本文在规范场空间上提出了一个泛函积分测度,它考虑了这个问题,并给出了规范自由度的正则化。对于广义p-形式Maxwell理论,得到了所有物理观测量的封闭表达式。格林函数的非平凡束结构的影响。最后计算了流形上奇异p-圈的圈值同态的真空期望值,包括Wilson算子的真空期望值,并导出了选择规则。

英文摘要:

We consider the covariant quantization of generalized abelian gauge theories on a closed and compact n-dimensional manifold whose space of gauge invariant fields is the abelian group of Cheeger-Simons differential characters. The space of gauge fields is shown to be a non-trivial bundle over the orbits of the subgroup of smooth Cheeger-Simons differential characters. Furthermore each orbit itself has the structure of a bundle over a multi-dimensional torus. As a consequence there is a topological obstruction to the existence of a global gauge fixing condition. A functional integral measure is proposed on the space of gauge fields which takes this problem into account and provides a regularization of the gauge degrees of freedom. For the generalized p-form Maxwell theory closed expressions for all physical observables are obtained. The Greens functions are shown to be affected by the non-trivial bundle structure. Finally the vacuum expectation values of circle-valued homomorphisms, including the Wilson operator for singular p-cycles of the manifold, are computed and selection rules are derived.

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。

↑