Experimental violation of a Bell inequality with two different degrees of freedom of entangled particle pairs

Abstract

We demonstrate hybrid entanglement of photon pairs via the experimental violation of a Bell inequality with two different degrees of freedom (DOF), namely the path (linear momentum) of one photon and the polarization of the other photon. Hybrid entangled photon pairs are created by Spontaneous Parametric Down Conversion and coherent polarization to path conversion for one photon. For that photon, path superposition is analyzed, and polarization superposition for its twin photon. The correlations between these two measurements give an S-parameter of S=2.653+/-0.027 in a CHSH inequality and thus violate local realism for two different DOF by more than 24 standard deviations. This experimentally supports the idea that entanglement is a fundamental concept which is indifferent to the specific physical realization of Hilbert space.

4 pages, 3 figures, typos in Fig.1 corrected

References in corpus (10)

• Quantum Cryptography
• Long-distance quantum communication with atomic ensembles and linear optics
• Experimental Realization of Teleporting an Unknown Pure Quantum State via Dual Classical and Einstein-Podolski-Rosen Channels
• Violation of Bell's inequality under strict Einstein locality conditions
• Beating the channel capacity limit for linear photonic superdense coding
• Generation of Hyperentangled Photons Pairs
• High efficiency entangled photon pair collection in type II parametric fluorescence
• Experimental realization of one-way quantum computing with two-photon four-qubit cluster states
• Realization and characterization of a 2-photon 4-qubit linear cluster state
• Experiments towards Falsification of Noncontextual Hidden Variable Theories

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