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arXiv 1805.09656hep-thgr-qc
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f(R)截断中的渐近安全性和场参数化依赖

Asymptotic safety and field parametrization dependence in the f(R) truncation

Gustavo P. de Brito, Nobuyoshi Ohta, Antonio D. Pereira, Anderson A. Tomaz, Masatoshi Yamada

摘要:

研究了在有效平均作用量的$f(R)$截断中泛函重整化群方程对场参数化的依赖性。我们进行了系统的分析多项式截断的不动点和临界指数的依赖性。我们发现,超越Einstein-Hilbert截断,结果是定性不同的参数化的选择。特别是,我们观察到有两种不同的不动点,一种有三个相关方向,另一种有两个。计算在背景近似下进行。我们比较我们的结果与现有的文献和分析不同的计划在正则化可以影响不动点结构。

英文摘要:

We study the dependence on field parametrization of the functional renormalization group equation in the $f(R)$ truncation for the effective average action. We perform a systematic analysis of the dependence of fixed points and critical exponents in polynomial truncations. We find that, beyond the Einstein-Hilbert truncation, results are qualitatively different depending on the choice of parametrization. In particular, we observe that there are two different classes of fixed points, one with three relevant directions and the other with two. The computations are performed in the background approximation. We compare our results with the available literature and analyze how different schemes in the regularizations can affect the fixed point structure.

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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