费曼特性函数的物理解释

笔者重温了为大多数物理学家遗忘或忽视了的费曼特性函数及其物理解释，指出它给出了生动的物理图象和解决某些复杂问题的洞察力.并以另法推导极坐标下的传播子公式为例，说明其用途及威力.

On Fegnman's physical interpretation of the characteristic function

This ariteile revisits Feynman's characteristic function and his physical interpretation, which is forgotten or neglected by the great majority of physicists, and points out that it gives a visid physical picture and insight to solve those seemingly complicated physical problems. To illustratec into ueefulness and powerqulness, this article gives an alternative derivation of the propagator in pdar coordinates as an example.