title: Synthetic 3D spin-orbit coupling.
abstract: We describe a method for creating a three-dimensional analogue to Rashba spin-orbit coupling in systems of ultracold atoms. This laser induced coupling uses Raman transitions to link four internal atomic states with a tetrahedral geometry, and gives rise to a Dirac point that is robust against environmental perturbations. We present an exact result showing that such a spin-orbit coupling in a fermionic system always gives rise to a molecular bound state.
authors.affiliation: Joint Quantum Institute, University of Maryland, College Park, Maryland 20742-4111, USA.
authors.forename: Brandon M
authors.initials: BM
authors.lastname: Anderson
authors.forename: Gediminas
authors.initials: G
authors.lastname: Juzeliūnas
authors.forename: Victor M
authors.initials: VM
authors.lastname: Galitski
authors.forename: I B
authors.initials: IB
authors.lastname: Spielman