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International Journal of Quantum Information

QUANTUM NONLOCALITY OF POLARIZATION-MOMENTUM HYPER-ENTANGLED STATES

Marco Barbieri, F. De Martini, Paolo Mataloni, Giuseppe Vallone

Published Feb 1, 2007• 0 citations
Publisher

Abstract

We present two experimental tests of nonlocality, namely the Bell's inequalities and the "All Versus Nothing" (AVN) proof, performed with a two photon hyper-entangled state, entangled in polarization and momentum. These states, which double the extension of the available qubits, are engineered by a simple experimental method which uses linear optics and a single Type I nonlinear crystal. The AVN test of local realism represents a generalization of the GHZ to the case of two entangled particles and two observers.

DOI
10.1142/s0219749907002505

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We present two experimental tests of nonlocality, namely the Bell's inequalities and the "All Versus Nothing" (AVN) proof, performed with a two photon hyper-entangled state, entangled in polarization and momentum. These states, which double the extension of the available qubits, are engineered by a simple experimental method which uses linear optics and a single Type I nonlinear crystal. The AVN test of local realism represents a generalization of the GHZ to the case of two entangled particles and two observers.
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We present a parametric source which allows the engineering of polarization-momentum hyperentangled two photon states based on linear optics and a single type-I nonlinear crystal. The nonlocal character of these states has been verified by various tests, including the “All Versus Nothing” test of local realism [A. Cabello, Phys. Rev. Lett. 87 , 010403 (2001)], which represents a generalization of the GHZ to the case of two entangled particles and two observers. We have also created a complete and deterministic Bell-state measurement by a novel experimental scheme which adopts polarization-momentum hyper-entanglement and requires linear optics and single photon detectors.
We present a parametric source which allows the engineering of polarization-momentum hyper- entangled two photon states based on linear optics and a single type-I nonlinear crystal. The nonlocal character of these states has been verified by various tests, including the All Versus Nothing test of local realism (A. Cabello, Phys. Rev. Lett. 87 , 010403 (2001)), which represents a generalization of the GHZ to the case of two entangled particles and two observers. We have also created a complete and deterministic Bell-state measure- ment by a novel experimental scheme which adopts polarization-momentum hyper-entanglement and requires linear optics and single photon detectors.
Two photon states entangled in polarization and momentum, hyper-entangled, have been generated by using linear optics and a single Type I nonlinear crystal. These states have been completely characterized and their nonlocal behaviour have been verified by independent Bell's inequalities tests performed in the two degrees of freedom of entanglement and by an "all versus nothing" test of local realism. The manipulation of these states may represent a useful control in quantum state engineering and Bell state measurements and, more in general, in Quantum Information applications.
We present an experimental method to engineer polarization-momentum hyperentangled two-photon states, using linear optics and a single type-I nonlinear crystal. These states have been completely characterized and their nonlocal behavior has been verified by an ``all versus nothing'' test of local realism, which represents a generalization of the Greenberger-Horne-Zeilinger (GHZ) to the case of two entangled particles and two observers. The manipulation of these states may represent a useful control in quantum state engineering and Bell state measurements and, more in general, in quantum information applications.
We report the experimental realization and the characterization of polarization and momentum hyper-entangled two photon states, generated by a new parametric source of correlated photon pairs. By adoption of these states a successful ''all versus nothing'' test of quantum mechanics was performed. The two photon hyper-entangled states are expected to find at an increasing rate a widespread application in state engineering and quantum information. PACS: 03.67.-a, 03.67.Mn, 03.67.Hk, 42.65. Lm