Gluon condensate in a pion superfluid beyond the mean-field approximation
Gluon condensate in a pion superfluid beyond the mean-field approximation
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介子超流体中的胶子凝聚超出平均场近似
DOI：
10.1103/physrevc.83.038201
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发表时间：
2010-12
影响因子：
3.1
通讯作者：
Zhuang, Pengfei
中科院分区：
文献类型：
--
作者：
Jiang, Yin;Zhuang, Pengfei
通过计算Nambu-Jona-Lasinio模型系统的状态方程，研究了介子超流体中的胶子凝聚。而在平均场近似中，介子的涨落使胶子的凝聚量减小，在有限的同位旋密度下，被破坏的标量对称可以平滑地恢复。
We study gluon condensate in a pion superfluid by calculating the equation of state of the system in the Nambu-Jona-Lasinio model. While in mean-field approximation the growing pion condensate leads to an increasing gluon condensate, meson fluctuations reduce the gluon condensate, and the broken scalar symmetry can be smoothly restored at finite isospin density.