Critical Behavior and Dimension Crossover of Pion Superfluidity
Critical Behavior and Dimension Crossover of Pion Superfluidity
复制标题
介子超流性的临界行为和维度交叉
DOI:
10.1103/physrevd.94.056012
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发表时间:
2015-11
期刊:
影响因子:
--
通讯作者:
Pengfei Zhuang
中科院分区:
文献类型:
--
作者:
Ziyue Wang;Pengfei Zhuang
We investigate the critical behavior of pion superfluidity in the frame of functional renormalization group. By solving the flow equation in the SU(2) linear sigma model with pion superfluidity at finite temperature and isospin density, and making comparison with the fixed point analysis of the flow diagram in a general $O(N)$ model at zero temperature and density but with continuous dimension, the pion superfluidity is a second order phase transition subject to a $O(2)$ universality class with a dimension crossover from $d_{\text{eff}}=4$ to $d_{\text{eff}}=3$. The usually used large $N$ expansion gives a temperature independent critical exponent $\beta$ and agrees with the renormalization group only at zero temperature.
DOI:
--
发表时间:
2008
期刊:
--
影响因子:
--
作者:
M. Kozlov;E. Levin;V. Khachtryan;J. Miller
通讯作者:
M. Kozlov;E. Levin;V. Khachtryan;J. Miller