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arXiv 0901.2984hep-thgr-qc
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高阶导数引力中的渐近安全性

Asymptotic safety in higher-derivative gravity

Dario Benedetti, Pedro F. Machado, Frank Saueressig

摘要:

利用泛函重整化群方法研究了高导数引力场的非微扰重整化群流。对$β$ -函数的非微扰贡献使已知的微扰紫外不动点变为具有三个紫外吸引和一个紫外排斥本征方向的非平凡不动点,这与引力的渐近安全猜想一致.这一转变对酉性问题的影响,通常困扰高导数引力理论,进行了讨论。

英文摘要:

We study the non-perturbative renormalization group flow of higher-derivative gravity employing functional renormalization group techniques. The non-perturbative contributions to the $β$-functions shift the known perturbative ultraviolet fixed point into a non-trivial fixed point with three UV-attractive and one UV-repulsive eigendirections, consistent with the asymptotic safety conjecture of gravity. The implication of this transition on the unitarity problem, typically haunting higher-derivative gravity theories, is discussed.

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