title: Spin waves in a Bose-Einstein--condensed atomic spin chain.
abstract: The spin dynamics of atomic Bose-Einstein condensates confined in a one-dimensional optical lattice is studied. The condensates at each lattice site behave like spin magnets that can interact with each other through both the light-induced dipole-dipole interaction and the static magnetic dipole-dipole interaction. We show how these site-to-site dipolar interactions can distort the ground-state spin orientations and lead to the excitation of spin waves. The dispersion relation of the spin waves is studied and possible detection schemes are proposed.
authors.affiliation: Optical Sciences Center, The University of Arizona, Tucson, Arizona 85721, USA.
authors.forename: Weiping
authors.initials: W
authors.lastname: Zhang
authors.forename: Han
authors.initials: H
authors.lastname: Pu
authors.forename: Chris
authors.initials: C
authors.lastname: Search
authors.forename: Pierre
authors.initials: P
authors.lastname: Meystre