Experimental Joint Weak Measurement on a Photon Pair as a Probe of Hardy’s Paradox

J. S. Lundeen and A. M. Steinberg
Phys. Rev. Lett. 102, 020404 – Published 14 January 2009

Abstract

It has been proposed that the ability to perform joint weak measurements on postselected systems would allow us to study quantum paradoxes. These measurements can investigate the history of those particles that contribute to the paradoxical outcome. Here we experimentally perform weak measurements of joint (i.e., nonlocal) observables. In an implementation of Hardy’s paradox, we weakly measure the locations of two photons, the subject of the conflicting statements behind the paradox. Remarkably, the resulting weak probabilities verify all of these statements but, at the same time, resolve the paradox.

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  • Received 24 August 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.020404

©2009 American Physical Society

Authors & Affiliations

J. S. Lundeen and A. M. Steinberg

  • Department of Physics, University of Toronto, 60 St. George Street, Toronto ON, M5S 1A7, Canada

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Vol. 102, Iss. 2 — 16 January 2009

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