摘要
通过对磁单极矢量势的积分表示取旋度,可以自然得出与狄拉克弦对应的磁场项的显明形式,该狄拉克弦可以是任意曲线。本文对具有不同狄拉克弦的矢量势之间的规范变换作了一些评注,讨论了狄拉克描述与吴大峻杨振宁描述中的电荷量子化问题。
By dealing with the integral representation of the vector potential of a magnetic monopole and calculating its curl,an explicit expression for the magnetic field on the Dirac string appears automatically.The Dirac string may be an arbitrary curve.Some notes on the gauge transformation between two vector potentials with different Dirac strings are given.The quantization of electric charge is discussed both in the Dirac description and the Wu-Yang description of magnetic monopole.
作者
林琼桂
LIN Qiong-gui(School of Physics, Sun Yat-Sen University, Guangzhou, Guangdong 510275)
出处
《物理与工程》
2020年第3期20-24,共5页
Physics and Engineering
基金
中山大学教务部2018年度教学质量工程类项目(中大教务2018年294号)。
关键词
磁单极
狄拉克弦
矢量势积分表示
规范变换
吴大峻杨振宁磁单极描述
电荷量子化
magnetic monopole
Dirac string
integral representation of vector potentials
gauge transformation
Wu-Yang description of magnetic monopole
quantization of electric charge
