Anomalous Spin segregation in a weakly interacting two-component Fermi gas
Other Condensed Matter
2010-12-06 v2 Quantum Gases
Statistical Mechanics
Abstract
We explain the spin segregation seen at Duke in a two-component gas of 6Li [Du, Luo, Clancy and Thomas, Phys. Rev. Lett. 101,150401 (2008)] as a mean-field effect describable via a collisionless Boltzmann equation. As seen in experiments, we find that slight differences in the trapping potentials in the two spin states drive small spin currents. Hartree-Fock type interactions convert these currents into a redistribution of populations in energy space, and consequently a long lived spin texture develops. We explore the interaction strength dependence of these dynamics, finding close agreement with experiment.
Cite
@article{arxiv.0901.4808,
title = {Anomalous Spin segregation in a weakly interacting two-component Fermi gas},
author = {Stefan S. Natu and Erich J. Mueller},
journal= {arXiv preprint arXiv:0901.4808},
year = {2010}
}
Comments
4 pages, 3 figures, published version. Text modified to include qualitative discussion of spin-segregation effect; 1 figure added