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Superconducting micro particles have been selectively trapped using a quadrupole magnetic field after the production of metallic micro particles by laser ablation in superfluid helium. Size dependence of the superconducting transition temperature will be discussed.
We observed the sudden deformation of a quadruply quantized vortex into a linear shape in a 87Rb (F=2,mF=2) Bose-Einstein condensate (BEC). Multiply quantized vortex is predicted to split into singly quantized vortices and the observed deformation is considered to be the onset of the splitting. The displacement of the vortex with respect to the center of the BEC would induce the observed splitting...
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