Phys. Rev. Lett. 88, 230405 (2002) [4 pages]

Longitudinal Spin Waves in a Dilute Bose Gas

Abstract

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J. E. Williams¹, T. Nikuni^2,*, and Charles W. Clark¹
¹National Institute of Standards and Technology, Technology Administration, U.S. Department of Commerce, Gaithersburg, Maryland 20899-8410
²Department of Physics, University of Toronto, Toronto, Ontario, Canada M5S 1A7

Received 28 December 2001; published 23 May 2002

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.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.88.230405

DOI:

10.1103/PhysRevLett.88.230405

PACS:

05.30.Jp, 32.80.Pj

^*Present address: Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.

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Phys. Rev. Lett. 88, 230405 (2002) [4 pages]

Longitudinal Spin Waves in a Dilute Bose Gas