Chromomagnetic Instability and the LOFF state in a two flavor Color   Superconductor
  We explore the relation between the chromomagnetic instability of a homogeneous two flavor color superconductor and the LOFF state. We perturb the free energy of the 2SC by generating a small net momentum for the quark pair. We find that the imaginary Meissner mass of a particular gluon implies that the LOFF state is energetically favored. 
Ioannis Giannakis and Hai-Cang Ren