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论文类型：期刊论文

发表时间：2015-01-06

发表刊物：Phys.Rev. D

学科门类：理学

一级学科：物理学

卷号：91

期号：2

页面范围：025003

摘要：We consider a symmetric scalar theory with quartic coupling in 4-dimensions and compare the standard 2PI calculation with a modified version which uses a functional renormalization group method. The set of integral differential equations that are obtained from the exact renormalization group method truncate naturally, without the introduction of additional approximations. The results of the two methods agree well, which shows that the exact renormalization group can be used at the level of the 2PI effective action to obtain finite results without the use of counter-terms. The method therefore

备注：arXiv:1404.0710，论文作者按姓氏排序，*为通讯作者