Research ArticleQuantum Mechanics

Experimental nonlocal and surreal Bohmian trajectories

Science Advances  19 Feb 2016:
Vol. 2, no. 2, e1501466
DOI: 10.1126/sciadv.1501466

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Abstract

Weak measurement allows one to empirically determine a set of average trajectories for an ensemble of quantum particles. However, when two particles are entangled, the trajectories of the first particle can depend nonlocally on the position of the second particle. Moreover, the theory describing these trajectories, called Bohmian mechanics, predicts trajectories that were at first deemed “surreal” when the second particle is used to probe the position of the first particle. We entangle two photons and determine a set of Bohmian trajectories for one of them using weak measurements and postselection. We show that the trajectories seem surreal only if one ignores their manifest nonlocality.

Keywords
  • weak measurement
  • quantum measurement
  • Bohmian mechanics
  • interpretations of quantum mechanics

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.

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