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arXiv 2012.12249hep-thgr-qcmath-phmath.MP
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基于同伦转移的规范不变微扰理论

Gauge Invariant Perturbation Theory via Homotopy Transfer

Christoph Chiaffrino, Olaf Hohm, Allison F. Pinto

摘要:

我们证明了一般规范理论的微扰展开可以用规范不变变量表示到微扰的所有阶。在这方面,我们推广的技术规范不变宇宙学扰动理论,使用Barnut变量,通过解释传递到规范不变领域作为一个同伦转移的强同伦李代数编码的规范理论。这是说明杨米尔斯理论,引力在平面和宇宙学背景和封闭的弦论的无质量部门。微扰引理产生一个算法程序,以确定规范不变变量的更高的修正和这些方面的行动。

英文摘要:

We show that the perturbative expansion of general gauge theories can be expressed in terms of gauge invariant variables to all orders in perturbations. In this we generalize techniques developed in gauge invariant cosmological perturbation theory, using Bardeen variables, by interpreting the passing over to gauge invariant fields as a homotopy transfer of the strongly homotopy Lie algebras encoding the gauge theory. This is illustrated for Yang-Mills theory, gravity on flat and cosmological backgrounds and for the massless sector of closed string theory. The perturbation lemma yields an algorithmic procedure to determine the higher corrections of the gauge invariant variables and the action in terms of these.

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