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Where is the Quantum Particle between two Position Measurements?

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Abstract

A controversy about counterfactual computation [Hosten et al., Nature, 439, 949 (2006), Vaidman, PRL 98, 160403 (2007)] reveals a paradoxical feature of a pre- and post-selected quantum particle: it can reach a certain location without being on the path that leads to and from this location.

© 2008 Optical Society of America

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