2017 Fiscal Year Final Research Report
Theory of force on quantum vortices in superconductors
| Project/Area Number |
15K05160
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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 |
Condensed matter physics II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KATO Yusuke 東京大学, 大学院総合文化研究科, 教授 (20261547)
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| Research Collaborator |
Kurosawa Noriyuki
Masaki Yusuke
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 超伝導 / 量子渦 / フラックフロー / 磁束量子 / マグナス力 / ローレンツ力 |
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| Outline of Final Research Achievements |
Dynamics of superconductors in magnetic fields are governed by their "weak points", i.e. properties of topological defects. A topological defect in superconductors is quantized magnetic flux, which is also called quantum vortex because the quantized magnetic flux is the center of superconducting circular currents. The problem is "what is the force on quantum vortex in superconductors?". In classical fluids, vortex is subject to Magnus force while magnetic flux is often claimed to feel the Lorentz force due the external current. In this project, we find that the constitutive force of Magnus and Lorentz forces is the only physically meaningful force. Our results are based on the time-dependent-Ginzburg-Landau theory.
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| Free Research Field |
物性理論
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