Spinor dipolar bose-einstein condensates: classical spin approach.
Bose-Einstein condensates which are dominated by magnetic dipole-dipole interaction are discussed under spinful situations. We treat the spin degrees of freedom as a classical spin vector, approaching from the large spin limit to obtain an effective minimal Hamiltonian. This is a version extended from a nonlinear sigma model. By solving the Gross-Pitaevskii equation, we find several novel spin textures where the mass density and spin density are strongly coupled, depending upon trap geometries due to the long-range and anisotropic natures of the dipole-dipole interaction.
Department of Physics, Okayama University, Okayama 700-8530, Japan.
M
M
Takahashi
Sankalpa
S
Ghosh
T
T
Mizushima
K
K
Machida