2015 Fiscal Year Final Research Report
Investigation of dynamics of multi-charged vortex in gaseous Bose-Einstein condensates
| Project/Area Number |
25400420
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | Nihon University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | ボース・アインシュタイン凝縮体 / 量子渦 / 幾何学的位相 / 多重渦度量子渦 |
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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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| Free Research Field |
量子エレクトロニクス
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