Orbital-angular-momentum-based experimental test of Hardy's paradox for multisetting and multidimensional systems

• URL: http://arxiv.org/abs/2001.06245v1
• Date: Fri, 17 Jan 2020 11:31:38 GMT
• Title: Orbital-angular-momentum-based experimental test of Hardy's paradox for multisetting and multidimensional systems
• Authors: Dongkai Zhang, Xiaodong Qiu, Tianlong Ma, Wuhong Zhang, and Lixiang Chen
• Abstract summary: We report the first experiment to demonstrate the Hardy's paradox for multiple settings and multiple outcomes. We showcase the nonlocality with an experimentally recording probability of 36.77% for five-setting three-dimensional OAM subspace.
• Score: 0.5219568203653523
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Characterizing high-dimensional entangled states is of crucial importance in quantum information science and technology. Recent theoretical progress has been made to extend the Hardy's paradox into a general scenario with multisetting multidimensional systems, which can surpass the bound limited by the original version. Hitherto, no experimental verification has been conducted to verify such a Hardy's paradox, as most of previous experimental efforts were restricted to two-dimensional systems. Here, based on two-photon high-dimensional orbital angular momentum (OAM) entanglement, we report the first experiment to demonstrate the Hardy's paradox for multiple settings and multiple outcomes. We demonstrate the paradox for two-setting higher-dimensional OAM subspaces up to d = 7, which reveals that the nonlocal events increase with the dimension. Furthermore, we showcase the nonlocality with an experimentally recording probability of 36.77% for five-setting three-dimensional OAM subspace via entanglement concentration, and thus showing a sharper contradiction between quantum mechanics and classical theory.

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