Abstract
We theoretically investigate the low-lying excitation spectra of coreless vortex states in Bose-Einstein condensates (BECs) with F=2 hyperfine spin degrees of freedom. Here, we extend the previous work in F=1 spinor BEC. In addition to the dynamical instabilities in F=1 coreless vortex states, we find an another set of dynamical instabilities due to different hyperfine spin interaction. The calculation is carried out in the possible parameter space of the F=2 87Rb atom. This study assists interpretation of experimental data and presents a general characteristics of the dynamical instability of F=2 hyperfine spin system. whether the ground state of the spin interaction is in the cyclic or polar phase. Our study can encourages the experiments to examine our results.
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Takahashi, M., Mizushima, T. & Machida, K. Dynamical Instability of Coreless Vortices in F=2 Spinor Bose-Einstein Condensates. J Low Temp Phys 158, 58–64 (2010). https://doi.org/10.1007/s10909-009-9925-8
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DOI: https://doi.org/10.1007/s10909-009-9925-8