arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1504.00749hep-ph
收藏

有限温度和密度下Nambu-Jona-Lasinio模型的RG流动

The RG flow of Nambu--Jona-Lasinio model at finite temperature and density

Ken-Ichi Aoki, Masatoshi Yamada

摘要:

利用泛函重整化群研究了有限温度和有限密度下的Nambu-Jona-Lasinio模型.研究了NJL模型中四费米耦合常数的RG流。在大- $N$领先近似和改进的近似下,我们得到了手征相界。大- $N$非主导项在消失温度处在费米面处具有奇异性。结果表明,大- $N$非主导项的量子修正在很大程度上影响了低温高密度区的相界。

英文摘要:

We study the Nambu--Jona-Lasinio model at finite temperature and finite density by using the functional renormalization group. The RG flows of the four-fermi coupling constant in the NJL model are investigated. We obtain the chiral phase boundary in cases of the large-$N$ leading approximation and an improved approximation. The large-$N$ non-leading term at the vanishing temperature has a singularity at the fermi surface. We show that the quantum corrections by the large-$N$ non-leading term largely influence the phase boundary at the low temperature and high density region.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑