Critical behavior of supersymmetric O(N) models in the large-N limit

Critical behavior of supersymmetric O(N) models in the large-N limit
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大 N 极限下超对称 O(N) 模型的临界行为

DOI:
10.1103/physrevd.84.125009
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发表时间:
2011
期刊:
影响因子:
5
通讯作者:
A. Wipf
A. Wipf
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
D. Litim;M. Mastaler;F. Synatschke-Czerwonka;A. Wipf

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我们导出了三维超对称模型尺度相关超势的超对称重整化群方程。对于一个超对称优化调节函数,我们在大极限下精确地解出了超势的RG方程。不动点解被精确边缘耦合分类。在弱耦合条件下存在唯一的不动点解,在中间耦合条件下存在两个独立的不动点解,在强耦合条件下不存在全局定义的不动点势。我们确定了超势和相关标量势的精确临界指数。最后,我们将四维理论的高温极限与纯标量理论的Wilson-Fisher不动点联系起来。
We derive a supersymmetric renormalization group (RG) equation for the scale-dependent superpotential of the supersymmetricmodel in three dimensions. For a supersymmetric optimized regulator function, we solve the RG equation for the superpotential exactly in the large-limit. The fixed-point solutions are classified by an exactly marginal coupling. In the weakly coupled regime there exists a unique fixed-point solution, for intermediate couplings we find two separate fixed-point solutions and in the strong coupling regime no globally defined fixed-point potentials exist. We determine the exact critical exponents both for the superpotential and the associated scalar potential. Finally, we relate the high-temperature limit of the four-dimensional theory to the Wilson-Fisher fixed point of the purely scalar theory.
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