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arXiv 1804.04409hep-thgr-qc
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重整化泛函重整化群

Renormalized Functional Renormalization Group

Stefan Lippoldt

摘要:

我们构造了一个新的有效平均作用及其流量方程。这种结构特别需要涨落场和背景场运动方程的一致性,即使对于有限的重整化群尺度也是如此。在这里,我们集中在量子引力的应用,而推广到规范理论这一想法是显而易见的。我们的方法对背景场近似有直接的影响,这是渐近安全方案中最突出的近似方案。我们概述了计算量子引力观测量的第一性原理使用新的有效平均作用量。

英文摘要:

We construct a new version of the effective average action together with its flow equation. The construction entails in particular the consistency of fluctuation field and background field equations of motion, even for finite renormalization group scales. Here we focus on the quantum gravity application, while the generalization of this idea to gauge theories is obvious. Our approach has immediate impact on the background field approximation, which is the most prominent approximation scheme within the asymptotic safety scenario. We outline the calculation of quantum gravity observables from first principles using the new effective average action.

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