在讲过去这些没有定论的观点和对我们现在的去向进行评论之前,我想我得承认我把历史过分简化了。仅管现在我们可以回顾和看清粒子或s矩阵观点与量子场论之间的对立,但生活中从来未有如此清楚的东西。在三十、四十年代确实是不清楚的。这段历史中的重大困惑之一是对某些问题(尽管决不是所有问题)来说,狄拉克的相对论量子力学——这个关于电子和电磁场的一个粒子和场的二元论力学——是 Before I speak of these inconclusive opinions and comment on our current whereabouts, I think I must admit that I simplified history too much. Although now we can review and see the contradiction between particle or s-matrix perspectives and quantum field theory, there is never such a clear picture in life. It really is not clear in the thirties and forties. One of the major puzzles in this history is that Dirac’s theory of relativistic quantum mechanics, a particle and field dualism mechanics of electrons and electromagnetic fields, is - for some, though not necessarily all -