ABSTRACT
The formalism of the quantum theory leads to results that agree with experiment with great accuracy and covers an extremely wide range of phenomena. As yet there are no experimental indications of any domain in which it might break down. Nevertheless, there still remain a number of basic questions concerning its fundamental significance which are obscure and confused. Thus for example one of the leading physicists of our time, M.Gell-Mann [1], has said “Quantum mechanics, that mysterious, confusing discipline, which none of us really understands but which we know how to use”.
