Protective Measurements
Quantum Physics
2008-01-18 v1
Abstract
A review of protective measurements. Protective measurement is a method for measuring an expectation value of an observable on a single quantum system. The quantum state of the system can be protected by a potential, when the state is a nondegenerate energy eigenstate with a known gap to neighboring states, or via Zeno effect by frequent projection measurements.
Cite
@article{arxiv.0801.2761,
title = {Protective Measurements},
author = {L. Vaidman},
journal= {arXiv preprint arXiv:0801.2761},
year = {2008}
}
Comments
An entry in the Compendium of Quantum Physics: Concepts, Experiments, History and Philosophy, ed. F. Weinert, K. Hentschel, D. Greenberger and B. Falkenburg