Expansion of 1D polarized superfluids: The FFLO state reveals itself
  We study the expansion dynamics of a one dimensional polarized Fermi gas after sudden release from confinement using both the mean-field Bogoliubov-de Gennes and the numerically exact Time-Evolving Block Decimation methods. Our results show that experimentally observable spin density modulations directly related to the presence of a Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) state develop during the expansion of the cloud, providing incontrovertible evidence of this long-sought state. 
Hong Lu, L. O. Baksmaty, C. J. Bolech, and Han Pu
cond-mat.quant-gas