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arXiv 1912.03071hep-th
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四维各向同性Lifshitz标度

Isotropic Lifshitz Scaling in four dimensions

Dario Zappala

摘要:

利用泛函重整化群研究了O(N)对称标量理论中各向同性Lifshitz点的存在性。特别是,在假设的较低临界维数d=4时,O(2)理论发现了不动点的连续线的证据,并且观察到的结构与在二维Berezinskiii-Kosterlitz-Bronchless相中观察到的性质具有明显的相似性。

英文摘要:

The presence of isotropic Lifshitz points for a O(N)-symmetric scalar theory is investigated with the help of the Functional Renormalization Group. In particular, at the supposed lower critical dimension d=4, evidence for a continuous line of fixed points is found for the O(2) theory, and the observed structure presents clear similarities with the properties observed in the 2-dimensional Berezinskii-Kosterlitz-Thouless phase.

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