Functional renormalization group approach to conventional theory of superfluidity and beyond
Functional renormalization group approach to conventional theory of superfluidity and beyond
复制标题
传统超流理论及其他理论的函数重整化群方法
DOI：
10.1088/1742-6596/529/1/012027
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Tetsuo Hatsuda
中科院分区：
文献类型：
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作者：
Yuya Tanizaki;Gergely Fejos;Tetsuo Hatsuda
利用费米子泛函重整化群（FRG）描述了具有吸引接触相互作用的两组分费米子系统的超流相变。阐明了费米子FRG方法与Bardeen-Cooper-Schrieffer（BCS）理论及其Gorkov和Melik-Barkhudarov（GMB）修正之间的联系，并研究了费米子自能FRG流对BCS+ GMB理论的超越.用费米子FRG计算了负散射长度区域的超流转变温度和相应的化学势。
Fermionic functional renormalization group (FRG) is applied to describe the superfluid phase transition of the two-component fermionic system with attractive contact interaction. Connection between the fermionic FRG approach and the Bardeen-Cooper-Schrieffer (BCS) theory with its Gorkov and Melik-Barkhudarov (GMB) correction is made clear, and the FRG flow of the fermion self-energy is also studied to go beyond the BCS+ GMB theory. The superfluid transition temperature and the associated chemical potential are calculated in the region of the negative scattering length using fermionic FRG.