Experimental nonlocal and surreal Bohmian trajectories.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 26989784.
- Also identified by DOI 10.1126/science.1501466 and PMC identifier 4788483.
- Licence recorded as CC BY-NC.
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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.