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Remote which-way-choice scheme: proposed foundations experiments

Artur Szczepanski
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Abstract

Twin photons from spontaneous parametric down-conversion with preselected polarization are used as spatially disjoint subsystems. One photon is subject to an interference measurement, while a projective measurement of the second photon induces the way-choice of the first photon. This would be an example of way-choice free of direct action on the interfering photon. Two further applications of the proposed scheme are considered: a new method of quantum information speed measurement, and a test of commutation of space-like remote measurements.

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Artur Szczepanski. 2005-09-10. Remote which-way-choice scheme: proposed foundations experiments. https://arxiv.org/abs/quant-ph/0508137

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