Phase Separation of Superfluids in the Chain of Four-Component Ultracold   Atoms
  We investigate the competition of various exotic superfluid states in a chain of spin-polarized ultracold fermionic atoms with hyperfine spin $F = 3/2$ and s-wave contact interactions. We show that the ground state is an exotic inhomogeneous mixture in which two distinct superfluid phases --- spin-carrying pairs and singlet quartets --- form alternating domains in an extended region of the parameter space. 
G. Barcza, E. Szirmai, J. S\'olyom, and \"O. Legeza
cond-mat.quant-gas