Spinor Bose-Einstein Condensates with Many Vortices
Abstract
Vortex-lattice structures of antiferromagnetic spinor Bose-Einstein condensates with hyperfine spin F=1 are investigated theoretically based on the Ginzburg-Pitaevskii equations near Tc. The Abrikosov lattice with clear core regions are found never stable at any rotation drive . Instead, each component i (i=0, 1) prefers to shift the core locations from the others to realize almost uniform order-parameter amplitude with complicated magnetic-moment configurations. This system is characterized by many competing metastable structures so that quite a variety of vortices may be realized with a small change in external parameters.
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