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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 19 — Sep. 10, 2012
  • pp: 21687–21692

Hardy’s nonlocality proof using twisted photons

Lixiang Chen and Jacquiline Romero  »View Author Affiliations

Optics Express, Vol. 20, Issue 19, pp. 21687-21692 (2012)

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Hardy’s nonlocality proof is considered as “the best version of Bell’s theorem”. We report an experimental implementation of this by measuring the orbital angular momentum (OAM) of entangled twisted photon pairs. Two advantages arise from using twisted photons. First, the limited OAM spectrum generated by parametric down-conversion provides a natural set of OAM non-maximally entangled states with selective degrees of entanglement. Second, the measurement of any non-trivial superposition of OAM states can be conveniently done with spatial light modulators. We measure states that are defined on asymmetric OAM Bloch spheres and show results which are incompatible with local realism.

© 2012 OSA

OCIS Codes
(270.0270) Quantum optics : Quantum optics
(050.4865) Diffraction and gratings : Optical vortices
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Quantum Optics

Original Manuscript: June 28, 2012
Revised Manuscript: August 28, 2012
Manuscript Accepted: August 31, 2012
Published: September 6, 2012

Lixiang Chen and Jacquiline Romero, "Hardy’s nonlocality proof using twisted photons," Opt. Express 20, 21687-21692 (2012)

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