2021 Fiscal Year Research-status Report
Quantum vortex dynamics in exotic superfluid systems
| Project/Area Number |
20K14376
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| Research Institution | Keio University |
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Principal Investigator |
エドモンズ マシュー 慶應義塾大学, 自然科学研究教育センター(日吉), 訪問研究員 (00865230)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | ultracold atoms / BEC / vortices / gauge fields |
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| Outline of Annual Research Achievements |
I have explored the effect of using two-dimensional matter-wave vortices to confine an ensemble of bosonic quantum impurities. This is modeled theoretically using a mass-imbalanced homogeneous two-component Gross-Pitaevskii equation where each component has independent atom numbers and equal atomic masses. By changing the mass imbalance of our system I have found that the shape of the vortices is deformed even at modest imbalances, leading to barrel-shaped vortices..The energy of impurity carrying vortex pairs is computed, revealing a mass-dependent energy splitting. I have then computed the excited states of the impurity, which I in turn use to construct “covalent bonds” for vortex pairs. This work opens a route to simulating synthetic chemical reactions with superfluid systems.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
I made a progress rather smoothly since I published two papers on this project.
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| Strategy for Future Research Activity |
I will study vortices of the second component inside a large vortex of the first component in two-component Bose-Einstein condensates.
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| Causes of Carryover |
Due to Corona virus pandemic.
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