Protective Measurements
L. Vaidman
TL;DR
Protective measurements enable the determination of expectation values of observables on single quantum systems by protecting the quantum state through potentials or the Zeno effect, offering insights into quantum measurement theory.
Contribution
This review introduces protective measurement techniques, highlighting methods to preserve quantum states during measurement and their implications for quantum theory.
Findings
Protection via potential for nondegenerate energy eigenstates
Protection through Zeno effect with frequent projections
Potential to measure expectation values on single systems
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.
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Taxonomy
TopicsChemical Safety and Risk Management · Risk and Safety Analysis