Quantum Words for a Quantum World

Abstract

A little-known movie by Alfred Hitchcock, Torn Curtain (1966) — admittedly not one of his best — tells a story of spying and science. It features a strange scene, where two physicists confront one another on some theoretical question. Their “discussion”, if it may be so called, consists solely in one of them writing some equations on the blackboard, only to have the other angrily grabbing the eraser and wiping out the formulas to write new ones of his own, etc., without ever uttering a single word. This picture of theoretical physics as an aphasic knowledge entirely consisting of mathematical symbols, as common as it may be in popular representations, we know to be wrong, of course, and we have to acknowledge that, far from being mute, we are a very talkative kind; physics is made out of words. What I wish to question here, however, is the very nature of our relationship with language, particularly as concerns quantum theory. My thesis will be that we have been somewhat offhand and rather indifferent with respect to the words we use, or rather without respect for them, and that this attitude has reinforced, and sometimes perhaps even produced some of the persisting epistemological and pedagogical difficulties in our field — not to speak of the new cultural problems that we are facing.