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Longitudinal spin waves in a dilute Bose gas

J. E. Williams, T. Nikuni, Charles W. Clark

cond-matarXiv:cond-mat/0112487

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.

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