Density Dependence of Charge-4 Vortex Splitting in Bose-Einstein Condensates

作者：Shibayama Hitoshi; Tsukada Akinori; Yoshihara Takahisa; Kuwamoto Takeshi^*

来源：Journal of the Physical Society of Japan, 2016, 85(5): 054401.

DOI：10.7566/JPSJ.85.054401

We studied the axial-direction density dependence of the splitting of a charge-4 vortex created in Rb-87 Bose-Einstein condensates. Vortices were generated by topological phase imprinting, and the axial density of the condensates was controlled by an optical potential. Linear and triangular arrangements of four single-charged vortices that emerged through the charge-4 vortex collapse were observed. The splitting of the charge-4 vortices was suppressed by maintaining the density outside the l = 2 unstable mode regions where linear arrangements were formed. In addition, we studied vortex dynamics in a high density region for which investigations have not been previously performed.

• 出版日期2016-5-15