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arXiv 2203.07009hep-th
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泛函重整化群的高阶导数扩张

Higher derivative extension of the functional renormalization group

Gota Tanaka, Asato Tsuchiya

摘要:

研究了泛函重整化群的高阶导数扩张。我们考虑标量场的FRG方程,它由有效作用量的高阶泛函导数和任意截止函数组成。我们证明了FRG方程的局部势近似确实可以再现Wilson-Fisher不动点附近的近似展开。

英文摘要:

We study higher derivative extension of the functional renormalization group (FRG). We consider FRG equations for a scalar field that consist of terms with higher functional derivatives of the effective action and arbitrary cutoff functions. We show that the epsilon expansion around the Wilson-Fisher fixed point is indeed reproduced by the local potential approximation of the FRG equations.

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