Stable particlelike solitons with multiply-quantized vortex lines in Bose-Einstein condensates

摘要

We show that a multiply-quantized vortex line core can be energeticallystable in a harmonically trapped two-component atomic Bose-Einstein condensate.The structure, in which the condensate component with the vortex line issurrounded by the second component forming a vortex ring, can be identified asa particlelike Skyrmion with a multiply-quantized winding number, and closelyresembles cosmic vortons.