Protective Measurements

Details Protective Measurements Protective Measurements

2008-01-17

arxiv.org/abs/0801.2761v1

Physics

Quantum Physics

An entry in the Compendium of Quantum Physics: Concepts, Experiments, History and Philosophy, ed. F. Weinert, K. Hentschel, D.

Scientific paper

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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