1998/03/18 by Tin-Lun Ho · 2 citations
Physics and Astronomy · #cond-mat
paper · pdf · doi:10.1103/physrevlett.81.742
11 pages, no figures. email : [email protected]
arxiv created 1998/03/18 · arxiv updated 2009/11/30
In an optical trap, the ground state of spin-1 Bosons such as 23Na, 39K, and 87Rb can be either a ferromagnetic or a "polar" state, depending on the scattering lengths in different angular momentum channel. The collective modes of these states have very different spin character and spatial distributions. While ordinary vortices are stable in the polar state, only those with unit circulation are stable in the ferromagnetic state. The ferromagnetic state also has coreless (or Skyrmion) vortices like those of superfluid 3He-A. Current estimates of scattering lengths suggest that the ground states of 23Na and 87Rb condensate are a polar state and a ferromagnetic state respectively.