ABSTRACT
This chapter examines the A. Einstein, B. Podolsky, and N. Rosen (EPR) argument and the opinion toward interpretational matters from various noted quantum physicists. The paradox of EPR can equally well be tested by polarization properties of pairs of photons. “When the momentum of a particle is known, its coordinate has no physical reality” is an essential component of the EPR argument. A useful pragmatic perspective on quantum mechanics is provided by N. G. Van Kampen. He argues that the difficulties in quantum mechanics only surface when one starts philosophizing: “this philosophizing has given rise to a number of ‘interpretations’, in which ψ is endowed with more physical significance than is needed”. There is a plethora of interpretations of quantum mechanics. Among the most prominent interpretations one finds are the Copenhagen interpretation and the many-worlds interpretation.
