Naturalizing the Copenhagen Interpretation

Abstract

The problem of quantum measurement is considered in the framework of a naturalized and evolutionary epistemology. Consider two simple textbook observations: a) quantum measurement is an information processing method invented for the purpose of exploring domains of the external world which are not accessible otherwise b) quantum measurement interprets signals from the external world with the help of a computing algorithm invented specifically for this purpose. Replace the words “quantum measurement” and “invented” in a) and b) by “vision” and “evolved respectively”. Both sentences remain simple textbook observations; this time about vision and its biological evolution. Since both a) and b) are substantial statements whether they refer to vision or to quantum measurement the analogy between these processes suggests that quantum measurement may be viewed as a culturally evolved perceptual mode. This idea is explored further by comparing the developments of vision and of quantum measurement. The comparison reveals some interesting similarities between the two processes. One result of the comparison and of viewing quantum measurement as a perceptual mode is a realistic formulation of the Copenhagen interpretation which in turn permits a rational explanation of why, in quantum measurement, some observables exist in nature only when observed.