Physical Review Letters
Coherent behavior of spinor Bose-Einstein condensates is studied in the presence of a significant uncondensed (normal) component. Normal-superfluid exchange scattering leads to near-perfect local alignment between the spin fields of the two components. We observe that, through this spin locking, spin-domain formation in the condensate is vastly accelerated as the spin populations in the condensate are entrained by large-amplitude spin waves in the normal component.
McGuirk, J. M.; Harber, D. M.; Lewandowski, H. J.; and Cornell, Eric A., "Normal-Superfluid Interaction Dynamics in a Spinor Bose Gas" (2003). Physics Faculty Contributions. 21.