title: Coherent collisional spin dynamics in optical lattices.
abstract: We report on the observation of coherent, purely collisionally driven spin dynamics of neutral atoms in an optical lattice. For high lattice depths, atom pairs confined to the same lattice site show weakly damped Rabi-type oscillations between two-particle Zeeman states of equal magnetization, induced by spin-changing collisions. Moreover, measurement of the oscillation frequency allows for precise determination of the spin-changing collisional coupling strengths, which are directly related to fundamental scattering lengths describing interatomic collisions at ultracold temperatures.
authors.affiliation: Johannes Gutenberg-Universität, Staudingerweg 7, 55099 Mainz, Germany. Widera@Uni-Mainz.DE
authors.forename: Artur
authors.initials: A
authors.lastname: Widera
authors.forename: Fabrice
authors.initials: F
authors.lastname: Gerbier
authors.forename: Simon
authors.initials: S
authors.lastname: Fölling
authors.forename: Tatjana
authors.initials: T
authors.lastname: Gericke
authors.forename: Olaf
authors.initials: O
authors.lastname: Mandel
authors.forename: Immanuel
authors.initials: I
authors.lastname: Bloch