Information-theoretical aspects of quantum measurement

Abstract

We present criteria for comparing measurements on a given system from the point of view of the information they provide. These criteria lead to a concept of informational completeness of a set of observables, which generalizes the conventional concept of completeness. The entropy of a state with respect to an arbitrary sample space of potential measurement outcomes is defined, and then studied in the context of configuration space and fuzzy stochastic phase space. © 1977 Plenum Publishing Corporation.