| 超流液氦~3He系统四种新相的边界问题 |
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| 引用本文： | 张端明.超流液氦~3He系统四种新相的边界问题[J].华中科技大学学报(自然科学版),1991(5). |
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| 作者姓名： | 张端明 |
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| 作者单位： | 华中理工大学物理系 |
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| 摘 要： | 本文讨论了作者提出的四种新相(C,D,E和F相)的边界问题,文中利用同伦群正合序列的标准代数拓扑方法,研究了有限长柱面边界条件对于超流~8He系统的四种新相的拓扑结构的影响,给出了相应表面缺陷的拓扑量子数.文中,提出周期性边界条件的假设,使问题的讨论更简明、更严格.
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| 关 键 词： | 超流液氦~8He系统 拓扑结构 拓扑量子数 表面缺陷 相对同伦群 正合序列 |
The Boundary Problem of Four New Phases of the Superfluid 3~He System |
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| Zhang Duanming.The Boundary Problem of Four New Phases of the Superfluid 3~He System[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1991(5). |
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| Authors: | Zhang Duanming |
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| Institution: | Zhang Duanming |
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| Abstract: | The boundary problem of four new phases (C, D, E, F) of the super-fluid He system -predicted by the author is discussed. The principal theoretical method, algebraic topology, the exact sequence of homotopy group in particular, has been used. The pure surface singularities (the point defect or line defect) are labelled by the element of the relative homotopy group n2(V,A) or n1(V,A).The effect of the boundary condition of a finite cylindrical surface on the topological structure of the four new phases of the superfluid has been studied with the assumption about the periodic boundary condition. The topological quantum number of the pure surface singularities given. |
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| Keywords: | Superfluid "He system Topological Structure Topological quan- tum number Pure surface singularity Relative homotopy group Periodic boundary condition |
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