2021-12-01T22:20:13Zhttps://nagoya.repo.nii.ac.jp/oaioai:nagoya.repo.nii.ac.jp:000227462021-03-01T14:50:49ZSpin Hall effect in a spinor dipolar Bose-Einstein condensateOshima, T.66947Kawaguchi, Y.66948We theoretically show that the spin Hall effect arises in a Bose-Einstein condensate (BEC) of neutral atoms interacting via the magnetic dipole-dipole interactions (MDDIs). Since the MDDI couples the total spin angular momentum and the relative orbital angular momentum of two colliding atoms, it works as a spin-orbit coupling. Thus, when we prepare a BEC in a magnetic sublevel m=0, thermally and quantum-mechanically excited atoms in the m=1 and −1 states feel the Lorentz-like forces in the opposite directions. This is the origin for the emergence of the spin Hall effect. We define the mass-current and spin-current operators from the equations of continuity and calculate the spin Hall conductivity from the off-diagonal current-current correlation function within the Bogoliubov approximation. We find that the correction of the current operators due to the MDDI significantly contributes to the spin Hall conductivity. A possible experimental situation is also discussed.journal articleAmerican Physical Society2016-05application/pdfPhysical Review A93053605053605http://doi.org/10.1103/PhysRevA.93.053605http://hdl.handle.net/2237/249022469-9926https://nagoya.repo.nii.ac.jp/record/22746/files/PhysRevA_93_053605.pdfeng©2016 American Physical Society