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Spin mixing in colliding spinor condensates: formation of an effective barrier
M. Guilleumas,B. Julia-Diaz, J. Mur-Petit, A. PollsABSTRACT:
The dynamics of F=1 spinor condensates initially prepared in a double-well potential is studied in the mean field approach. It is shown that a small seed of $m=0$ atoms on a system with initially well separated m=1 and m=-1 condensates has a dramatic effect on their mixing dynamics, acting as an effective barrier for a remarkably long time. We show that this effect is due to the spinor character of the system, and provides an observable example of the interplay between the internal spin dynamics and the macroscopic evolution of the magnetization in a spinor Bose-Einstein condensate.
- (upper) Scalar condensate on the harmonic trap
- (middle) Domain formation on a spinor condensate initially not displaced from the center of the trap, relative populations: (42%, 4%, 54%)
- (lower) Initially displaced F=1 spinor condensate evolving on the trap with the same relative populations as before. The dipolar osciallation and the internal dynamics decouple completely.
- (upper) As reference we show in the upper panel the dipolar
oscillation of a scalar condensate.
- (middle) Binary mixture prepared by adding a barrier to the
trap. Then at t=0 the central barrier is switched off and the
condensates are allowed to collide inside the harmonic trap.
- (lower) Spinor condensate, barrier like effect.
