| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
We studied the density dependence of the decay dynamics of a charge-4 vortex created in 87Rb Bose-Einstein condensates. Vortices were created by topological phase imprinting. The 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 decay were observed. The triangular arrangements were confirmed for the first time, and those observation frequency was about 3% of that of linear arrangements. The decay of cahrge-4 vorticis was suppressed by controlling the condensate density. In addition, we studied vortex dynamics in a high density region for with investigations have not been previously performed, and we obtained the results consistent with theoretical predictions.
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