In contrast to non-relativistic quantum mechanics, which can be considered logically
complete, we possess today only fragments of a relativistic quantum mechanics. We shall …

Quantum theory and the special theory of relativity emerged almost simultaneously. Through
the formative years of quantum theory, from 1900 to about 1928, arguments based on the …

Let me begin by recalling the way I learned about Dirac's relativistic equation of the electron.
It was from a letter to Max Born who asked Dirac to review an article by a third person. The …

Whereas nonrelativistic quantum mechanics is sufficient for any understanding of atomic
and molecular spectra, relativistic quantum mechanics explains the finer details …

In 1932, when I started my research career as an assistant to Nishina, Dirac published a
paper in the Proceedings of the Royal Society, London. In this paper, he discussed the …

The search for a theory of the elementary particles which is founded on the well-established
principles of quantum mechanics and conforms at the same time with the requirements of …

" This book is the second in a series of four volumes devoted respectively to (1)
Nonrelativistic Quantum Mechanics (2) Relativistic Quantum field Theory (3) Exercises and …

I wish to discuss some rather incomplete ideas concerning difficulties that arise in some
parts of quantum mechanics. In general there have been no serious difficulties when we are …

It is remarkable that after almost a half century of development and continuing success, there
still is no general agreement on how the quantum theory is to be interpreted, or indeed …

The subject of the following lecture is nearly related to those of the foregoing lectures by
professors HEITLEI¢ and~) IlChC~ but the point of view is different from theirs although not …