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arXiv 0705.3340gr-qchep-thmath-phmath.MP
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弯曲时空中的重整化量子Yang-Mills场

Renormalized Quantum Yang-Mills Fields in Curved Spacetime

Stefan Hollands

摘要:

本文证明了量子杨-米尔斯理论可以一致地定义为任意全局双曲洛伦兹时空上的重整化微扰量子场论。为此,我们构造了形式幂级数意义下的非对易观测量代数,以及相应的量子态空间。该代数包含所有规范不变的、重整化的、相互作用的量子场算符(场强及其导数的多项式),以及它们的所有关系,如对易关系或算子乘积展开。它可以被看作是经典杨-米尔斯理论的泊松代数的变形量子化,配备了Peierls括号。该代数被构造为描述具有鬼场和反场的规范固定理论的辅助代数的上同调。一个关键的技术难点是在重整化水平上建立一个合适的沃德恒等式的层次,以确保相互作用的BRST电流的守恒,并且相互作用的BRST电荷是幂零的。物理相互作用场观测量的代数作为该电荷的上同调得到。作为我们构造的结果,我们可以证明算子乘积展开在规范不变算子空间上是封闭的。类似地,证明了重整化群流不离开规范不变算子空间。

英文摘要:

We present a proof that quantum Yang-Mills theory can be consistently defined as a renormalized, perturbative quantum field theory on an arbitrary globally hyperbolic curved, Lorentzian spacetime. To this end, we construct the non-commutative algebra of observables, in the sense of formal power series, as well as a space of corresponding quantum states. The algebra contains all gauge invariant, renormalized, interacting quantum field operators (polynomials in the field strength and its derivatives), and all their relations such as commutation relations or operator product expansion. It can be viewed as a deformation quantization of the Poisson algebra of classical Yang-Mills theory equipped with the Peierls bracket. The algebra is constructed as the cohomology of an auxiliary algebra describing a gauge fixed theory with ghosts and anti-fields. A key technical difficulty is to establish a suitable hierarchy of Ward identities at the renormalized level that ensure conservation of the interacting BRST-current, and that the interacting BRST-charge is nilpotent. The algebra of physical interacting field observables is obtained as the cohomology of this charge. As a consequence of our constructions, we can prove that the operator product expansion closes on the space of gauge invariant operators. Similarly, the renormalization group flow is proved not to leave the space of gauge invariant operators.

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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