Half-skyrmion and vortex-antivortex pairs in spinor condensates
Date of Issue2015
Institute of Advanced Studies
We propose a simple experimental scheme to generate spin textures in the ground state of interacting ultracold bosonic atoms loaded in a two-dimensional harmonic trap. Our scheme is based on two copropagating Laguerre-Gauss laser beams illuminating the atoms and coupling two of their internal ground state Zeeman sublevels. Using a Gross-Pitaevskii description, we show that the ground state of the atomic system has different topological properties depending on the interaction strength and the laser beam intensity. A half-skyrmion state develops at low interactions while a vortex-antivortex pair develops at large interactions.
Physical Review A
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