Fulde-Ferrell-Larkin-Ovchinnikov states in equally populated Fermi gases in a two-dimensional moving optical lattice  

作　　者：Jin-Ge Chen Yue-Ran Shi Ren Zhang Kui-Yi Gao Wei Zhang 陈金鸽;石悦然;张仁;高奎意;张威(Department of Physics,Renmin University of China,Beijing 100872,China;School of Physics,Xi’an Jiaotong University,Xi’an 710049,China;Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices,Renmin University of China,Beijing 100872,China)

机构地区：[1]Department of Physics,Renmin University of China,Beijing 100872,China [2]School of Physics,Xi’an Jiaotong University,Xi’an 710049,China [3]Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices,Renmin University of China,Beijing 100872,China

出　　处：《Chinese Physics B》2021年第10期143-148,共6页中国物理B（英文版）

基　　金：supported by the Beijing Natural Science Foundation,China(Grant No.Z180013);the National Natural Science Foundation of China(Grant Nos.11522436,11774425,and 12074428);the National Key R&D Program of China(Grant No.2018YFA0306501);the Research Funds of Renmin University of China(Grant Nos.16XNLQ03 and 18XNLQ15)。

摘　　要：We study the possibility of stabilizing a Fulde-Ferrell-Larkin-Ovchinnikov(FFLO)state in an equally populated two-component Fermi gas trapped in a moving two-dimensional optical lattice.For a system with nearly half filling,we find that a finite pairing momentum perpendicular to the moving direction can be spontaneously induced for a proper choice of lattice velocity.As a result,the total pairing momentum is tilted towards the nesting vector to take advantage of the significant enhancement of the density of states.

关 键 词：FFLO state optical lattice ultracold Fermi gas SUPERFLUID 

分 类 号：O734[理学—晶体学]