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Lettere al nuovo cimento della societa italiana di fisica/Lettere al nuovo cimento

On the physical nonexistence of signals going backwards in time, and quantum mechanics

Augusto Garuccio, G. Maccarrone, Erasmo Recami, Jean Pierre Vigier

Published Jan 1, 1980• 21 citations
Publisher
DOI
10.1007/bf02750296

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In quantum theory, no-go theorems are important as they rule out the existence of a particular physical model under consideration. For instance, the Greenberger-Horne-Zeilinger (GHZ) theorem serves as a no-go theorem for the nonexistence of local hidden variable models by presenting a full contradiction for the multipartite GHZ states. However, the elegant GHZ argument for Bell's nonlocality does not go through for bipartite Einstein-Podolsky-Rosen (EPR) state. Recent study on quantum nonlocality has shown that the more precise description of EPR's original scenario is "steering", i.e., the nonexistence of local hidden state models. Here, we present a simple GHZ-like contradiction for any bipartite pure entangled state, thus proving a no-go theorem for the nonexistence of local hidden state models in the EPR paradox. This also indicates that the very simple steering paradox presented here is indeed the closest form to the original spirit of the EPR paradox.