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Experimental nonlocal steering of Bohmian trajectories
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Stockholm Univ, Sweden.
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2017 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 25, no 13, p. 14463-14472Article in journal (Refereed) Published
Abstract [en]

Interpretations of quantum mechanics (QM), or proposals for underlying theories, that attempt to present a definite realist picture, such as Bohmian mechanics, require strong non-local effects. Naively, these effects would violate causality and contradict special relativity. However if the theory agrees with QM the violation cannot be observed directly. Here, we demonstrate experimentally such an effect: we steer the velocity and trajectory of a Bohmian particle using a remote measurement. We use a pair of photons and entangle the spatial transverse position of one with the polarization of the other. The first photon is sent to a double-slit-like apparatus, where its trajectory is measured using the technique of Weak Measurements. The other photon is projected to a linear polarization state. The choice of polarization state, and the result, steer the first photon in the most intuitive sense of the word. The effect is indeed shown to be dramatic, while being easy to visualize. We discuss its strength and what are the conditions for it to occur.

Place, publisher, year, edition, pages
Optical Society of America, 2017. Vol. 25, no 13, p. 14463-14472
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-211009DOI: 10.1364/OE.25.014463ISI: 000404189800051Scopus ID: 2-s2.0-85021367448OAI: oai:DiVA.org:kth-211009DiVA, id: diva2:1123229
Note

QC 20170712

Available from: 2017-07-12 Created: 2017-07-12 Last updated: 2017-11-29Bibliographically approved

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