Reality and measurement of the wave function

W. G. Unruh
1994 Physical Review A. Atomic, Molecular, and Optical Physics  
Using a simple version of the model for the quantum measurement of a two level system, the contention of Aharonov, Anandan, and Vaidman that one must in certain circumstances give the wavefunction an ontological as well as an epistemological significance is examined. I decide that their argument that the wave function of a system can be measured on a single system fails to establish the key point and that what they demonstrate is the ontological significance of certain operators in the theory,
more » ... ors in the theory, with the wave function playing its usual epistemological role.
doi:10.1103/physreva.50.882 pmid:9910970 fatcat:26oexn4n5jc3pgqjssmfw3ylwa