Stern-Gerlach Entanglement in Spinor Bose-Einstein Condensates
  Entanglement of spin and position variables produced by spatially inhomogeneous magnetic fields of Stern-Gerlach type acting on spinor Bose-Einstein condensates may lead to interference effects at the level of one-boson densities. A model is worked out for these effects which is amenable to analytical calculation for gaussian shaped condensates. The resulting interference effects are sensitive to the spin polarization properties of the condensate. 
S. Cruz-Barrios, M. C. Nemes and A. F. R. de Toledo Piza