Phase diagram of the Fermi–Hubbard model with spin-dependent external potentials: A DMRG study*
Wei Xing-Bo, Meng Ye-Ming, Wu Zhe-Ming, Gao Xian-Long
       
The momentum pair distributions for the potential imbalance of γ = 4 with varying attractive interactions (from top u = −3.0 to bottom u = −0.2). A smooth crossover from the BCS phase, NP phase, to FP-FFLO phase occurs.