Ginzburg-Landau approach to the three flavor LOFF phase of QCD
  We explore, using a Ginzburg-Landau expansion of the free energy, the Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) phase of QCD with three flavors, using the NJL four-fermion coupling to mimic gluon interactions. We find that, below the point where the QCD homogeneous superconductive phases should give way to the normal phase, Cooper condensation of the pairs u-s and d-u is possible, but in the form of the inhomogeneous LOFF pairing. 
R. Casalbuoni, R. Gatto, N. Ippolito, G. Nardulli, M. Ruggieri