对称变换和守恒律SYMMETRY TRANSFORMATIONS AND CONSERVATION LAWS
李子平;
摘要(Abstract):
物理系统的非拓朴性守恒量与此系统的对称性有密切关系,根据对称性导出相应的守恒律这个基本问题,现今所采用的观点和方法极不统一,这样就带来了不必要的混淆。本文试企从统一的观点来讨论这个问题,即从对称变换保持系统的动力学方程(以及对易关系):不变出发,分别来推导相对论力学、量子力学、经典场论、量子场论中的连续对称变换所产生的守恒律,而不借助于拉格朗日体制的Nther定理。把结果用于非Abel规范理论中,同步对称不变性导致场的守恒角动量表明,自旋和同步旋对场的角动量均有贡献。
关键词(KeyWords):
基金项目(Foundation):
作者(Authors): 李子平;
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