Implication of the Lüders Postulate for the Distinguishability of Observables

摘要

The Lüders postulate is reviewed and implications for the distinguishability of observables of quantum mechanics as presented by yon Neumann. It describes unambiguously the measurement of observables with a degenerate spectrum. As an example, the efficient distinguishability of two similar spin-1/2 particle observables is described and implementation issues are analyzed. Potential applications in the field of quantum computers are outlined.