Spin-charge separation in ultra-cold quantum gases
  We investigate the physical properties of quasi-1D quantum gases of fermion atoms confined in harmonic traps. Using the fact that for a homogeneous gas, the low energy properties are exactly described by a Luttinger model, we analyze the nature and manifestations of the spin-charge separation. Finally we discuss the necessary physical conditions and experimental limitations confronting possible experimental implementations. 
A. Recati, P.O. Fedichev, W. Zwerger, P.Zoller