Superexchange Interactions
Superexchange interactions determine the spin order in, for example, two nearby hydrogen molecules and in several insulators such as ionic solids like CuO and MnO.
Superexchange interactions form the basis of quantum magnetism in correlated electron systems. They are believed to play a major role in high-temperature superconductivity.
Our goal is to probe and control superexchange interactions in ultracold atoms. We have developed a new approach to preparing, detecting, and controlling these interactions in ultracold spinor atoms loaded in optical superlattices. This approach has already led to the first experimental observation of superexchange interactions in these systems.
Science, 319, 295 (2008) , Phys. Rev . Lett 99, 140601 (2007).
