title: Longitudinal spin waves in a dilute bose gas.
abstract: We present a kinetic theory for a dilute noncondensed Bose gas of two-level atoms that predicts the transient spin segregation observed in a recent experiment. The underlying mechanism driving spin currents in the gas is due to a mean-field effect arising from the quantum interference between the direct and exchange scattering of atoms in different spin states. We numerically solve the spin Boltzmann equation, using a one-dimensional model, and find excellent agreement with experimental data.
authors.affiliation: National Institute of Standards and Technology, Technology Administration, U.S. Department of Commerce, Gaithersburg, Maryland 20899-8410, USA.
authors.forename: J E
authors.initials: JE
authors.lastname: Williams
authors.forename: T
authors.initials: T
authors.lastname: Nikuni
authors.forename: Charles W
authors.initials: CW
authors.lastname: Clark