Antiferromagnetic order and dynamics in lattice-trapped $^{87}$Rb

Optical lattices present an almost ideal environment in which to realize model condensed-matter systems and study strongly-correlated many-body behavior. Using an initial system ($^{87}$Rb) deep in the Mott-insulating regime, we create antiferromagnetic order in an double-well optical lattice using a effective magnetic field technique that allows spectral resolution of individual sublattices. With the use of a ``staggered field", we study spin dynamics in the lattice as the tunnel coupling in the system is increased and the staggered field is varied.