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宏观电动力学中电磁势的意义
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作者 朱绍文 《宝鸡师范学院学报(自然科学版)》 1993年第1期128-134,共7页
在宏观电磁理论中,电磁势的引入,不仅使场的运动方程式数目减少,使处理问题简化,而且在狭义相对论中,引入的矢势和标势又和谐地组成一个四维矢量,使理论清析完美又易于理解。在量子理论中,薛定谔方程一建立就含有矢势A,虽然尔后许多人... 在宏观电磁理论中,电磁势的引入,不仅使场的运动方程式数目减少,使处理问题简化,而且在狭义相对论中,引入的矢势和标势又和谐地组成一个四维矢量,使理论清析完美又易于理解。在量子理论中,薛定谔方程一建立就含有矢势A,虽然尔后许多人曾努力试图以磁场H代替A,但都没有成功。后来,1959年,Bohm和Aharonov从近代量子理论的观点预言了势的物理效应,并且次年即为实验所证实。更显示了势所具有物理内容。从这些情况来看。 展开更多
关键词 电动力学 电磁 宏观电磁理论
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Boundary conditions: An effect of average of microscopic Maxwell’s equations
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作者 江滨浩 刘永坦 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2004年第4期433-436,共4页
It is well known that the macroscopic Maxwell’s equations can be obtained from the corresponding microscopic or atomic equations by a proper averaging process. The purpose of this paper is to present the macroscopic ... It is well known that the macroscopic Maxwell’s equations can be obtained from the corresponding microscopic or atomic equations by a proper averaging process. The purpose of this paper is to present the macroscopic Maxwell’s equations which are valid in all regions of space, including an interface between two different media; and the boundary conditions can naturally emerge from the macroscopic equations as an effect of average of the microscopic Maxwell’s equations. In addition, the application of the unit step functions and the Dirac delta function to our discussion not only permits great mathematical simplicity but also gives rise to convenient physical concepts for the description and representation of the actual fields in the vicinity of the interface. 展开更多
关键词 electromagnetic theory boundary condition macroscopic averaging process step function and dirac delta function
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