二维向量场的分布图样及其对应的拓扑荷DISTRIBUTION PATTERNS OF TWO-DIMENSIONAL VECTOR FIELDS AND CORRESPONDING TOPOLOGICAL CHARGES
张冉,刘鑫
摘要(Abstract):
拓扑现象是当今物理学研究的热点,该领域的核心研究对象之一是缺陷的拓扑荷。后者往往体现为相关向量场分布的旋转度,因此分辨向量场的图样及其所对应的旋转度有助于识别拓扑荷。这同时也提供了一种可能,即设计特定的向量场分布,以激发出具备特定拓扑荷的缺陷结构。因而清晰掌握并分辨具有不同旋转度(对应拓扑荷)的向量场对研究者十分必要。本文先解说薛定谔量子力学波函数场中所蕴含的缺陷结构的拓扑荷及其与同构的二维向量场旋转度之间的关系,再详细给出二维平面中旋转度为任意正、负整数时的向量场分布图样。本文对初涉拓扑物理学领域的研究生和高年级本科生有重要的参考价值。
关键词(KeyWords): 拓扑物理;拓扑荷;旋转度;二维向量场;分布图样
基金项目(Foundation): 北京市自然科学基金(IS23030,Z180007);; 国家自然科学基金(11572005)
作者(Author): 张冉,刘鑫
DOI: 10.27024/j.wlygc.2026.03.11.02
参考文献(References):
- [1] 杨振宁,葛墨林,何杨辉.拓扑与物理[M].南昌:江西科技出版社,2021.YANG C N,GE M L,HE Y H.Topology and physics[M].Nanchang:Jiangxi Science & Technology Press,2021.(in Chinese)
- [2] NAKAHARA M.Geometry,topology and physics[M].CRC press,2018.
- [3] 金国钧.凝聚体中的拓扑量子态[J].物理学进展,2019,39(6):187.JIN G J.Topological quantum states in condensed matter[J].Progress in Physics,2019,39(6):187.(in Chinese)
- [4] SUTCLIFFE P.JNR Skyrmions[J].Journal of High Energy Physics,2024,2024(12):54.
- [5] KIBBLE T W B.Topology of cosmic domains and strings[J].Journal of Physics A:Mathematical and General,1976,9(8):1387-1398.
- [6] FADDEEV L,NIEMI A J.Partially dual variables in SU(2) Yang-Mills theory[J].Physical Review Letters,1999,82(8):1624.
- [7] Eric Priest,Terry Forbes.Magnetic reconnection:MHD theory and applications[M].Cambridge University Press,2000.
- [8] 张洪起.太阳磁学[M].北京:科学出版社,2024.ZHANG H Q.Solar magnetism[M].Beijing:Science Press,2024.(in Chinese)
- [9] 朱方泽,常治文,黄侯迪,等.拓扑新材料研究前沿的理论基础导引Ⅰ:量子霍尔效应[J].物理与工程,2022,32(6):104-120,126.ZHU F Z,CHANG Z W,HUANG H D,et al.Introduction to basics of new topological material research Ⅰ:quantum Hall effects[J].Physics and Engineering,2022,32(6):104-120,126.(in Chinese)
- [10] 黄侯迪,常治文,刘鑫.拓扑新材料研究前沿的理论基础导引Ⅱ:多种拓扑材料[J].物理与工程,2023,33(1):172-188.HUANG H D,CHANG Z W,LIU X.Introduction to basics of new topological material research Ⅱ:various topological materials[J].Physics and Engineering,2023,33(1):172-188.(in Chinese)
- [11] 常治文,刘鑫.拓扑绝缘体中两带模型的规范理论[J].物理与工程,2020,30(5):64-71.CHANG Z W,LIU X.A gauge theory in two-band model of topological insulator[J].Physics and Engineering,2020,30(5):64-71.(in Chinese)
- [12] CHANG Z W,HAO W C,LIU X.Design of higher Chern number two-band structures from topological defect perspective[J].Journal of Physics:Condensed Matter,2024,36(42):425501.
- [13] CHANG Z W,HAO W C,LIU X.Topological defects and boundary states in four-dimensional topological insulator[J].Europhysics Letters,2024,146(3):36002.
- [14] 李正元,钱敏.向量场的旋转度理论及其应用[M].北京:北京大学出版社,1982.LI Z Y,QIAN M.Vector rotation degree theory and its application[M].Beijing:Peking University Press,1982.(in Chinese)
- [15] DUAN Y,LIU X,ZHANG P.Decomposition theory of the U(1) gauge potential and the London assumption in topological quantum mechanics[J].Journal of Physics:Condensed Matter,2002,14(34):7941-7947.
- [16] 朱温文,刘鑫.规范势分解与拓扑流理论及其在拓扑绝缘体研究中的应用[J].中国科学:物理学,力学,天文学,2018,48(10):13-32.ZHU W,LIU X.Gauge potential decomposition and topological current theories with applications in the study of topological insulators[J].Science China Physics,Mechanics & Astronomy,2018,48(10):13-32.(in Chinese)