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Spin-orbit coupling induced fractionalized Skyrmion excitations in rotating and rapidly quenched spin-1 Bose-Einstein condensates
We investigate the fractionalized Skyrmion excitations induced by spin-orbit
coupling in rotating and rapidly quenched spin-1 Bose-Einstein condensates. Our
results show that the fractionalized Skyrmion excitation depends on the
combination of spin-orbit coupling and rotation, and it originates from a
dipole structure of spin which is always embedded in three vortices constructed
by each condensate component respectively. When spin-orbit coupling is larger
than a critical value, the fractionalized Skyrmions encircle the center with
one or several circles to form a radial lattice, which occurs even in the
strong ferromagnetic/antiferromagnetic condensates. We can use both the
spin-orbit coupling and the rotation to adjust the radial lattice. The
realization and the detection of the fractionalized Skyrmions are compatible
with current experimental technology.Comment: 5 pages, 4 figure
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