title: Experimental nonlocal and surreal Bohmian trajectories.
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.
authors.affiliation: Centre for Quantum Information and Quantum Control, Department of Physics, University of Toronto, 60 Saint George Street, Toronto, Ontario M5S 1A7, Canada.; Canadian Institute for Advanced Research, 180 Dundas Street West, Suite 1400, Toronto, Ontario M5G 1Z8, Canada.
authors.forename: Dylan H
authors.initials: DH
authors.lastname: Mahler
authors.affiliation: Centre for Quantum Information and Quantum Control, Department of Physics, University of Toronto, 60 Saint George Street, Toronto, Ontario M5S 1A7, Canada.; Canadian Institute for Advanced Research, 180 Dundas Street West, Suite 1400, Toronto, Ontario M5G 1Z8, Canada.
authors.forename: Lee
authors.initials: L
authors.lastname: Rozema
authors.affiliation: Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Kent
authors.identifier: 0000-0002-5581-8892
authors.initials: K
authors.lastname: Fisher
authors.affiliation: Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Lydia
authors.initials: L
authors.lastname: Vermeyden
authors.affiliation: Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada.
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Resch
authors.affiliation: Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia.
authors.forename: Howard M
authors.initials: HM
authors.lastname: Wiseman
authors.affiliation: Centre for Quantum Information and Quantum Control, Department of Physics, University of Toronto, 60 Saint George Street, Toronto, Ontario M5S 1A7, Canada.; Canadian Institute for Advanced Research, 180 Dundas Street West, Suite 1400, Toronto, Ontario M5G 1Z8, Canada.
authors.forename: Aephraim
authors.initials: A
authors.lastname: Steinberg
keywords: Bohmian mechanics; interpretations of quantum mechanics; quantum measurement; weak measurement