Spin-Orbit Coupling and Spin Textures in Optical Superlattices
  We proposed and demonstrated a new approach for realizing spin orbit coupling with ultracold atoms. We use orbital levels in a double well potential as pseudospin states. Two-photon Raman transitions between left and right wells induce spin-orbit coupling. This scheme does not require near resonant light, features adjustable interactions by shaping the double well potential, and does not depend on special properties of the atoms. A pseudospinor Bose-Einstein condensate spontaneously acquires an antiferromagnetic pseudospin texture which breaks the lattice symmetry similar to a supersolid. 
Junru Li, Wujie Huang, Boris Shteynas, Sean Burchesky, Furkan Cagri   Top, Edward Su, Jeongwon Lee, Alan O. Jamison and Wolf...
cond-mat.quant-gas physics.atom-ph quant-ph