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Quantum Mechanical Interaction-Free Measurements

Avshalom C. Elitzur, Lev Vaidman

hep-tharXiv:hep-th/9305002

Abstract

A novel manifestation of nonlocality of quantum mechanics is presented. It is shown that it is possible to ascertain the existence of an object in a given region of space without interacting with it. The method might have practical applications for delicate quantum experiments.

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