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Experimental violation of Tsirelson's bound by Maxwell fields

N. Sandeau 1 Hassan Akhouayri 2 A. Matzkin 3 Thomas Durt 4
1 SEMO - SEMO
FRESNEL - Institut FRESNEL
2 ILM - ILM
FRESNEL - Institut FRESNEL
4 CLARTE - CLARTE
FRESNEL - Institut FRESNEL
Abstract : In analogy with quantum optics it is possible to impose nonseparability between different degrees of freedom of an optical beam. The resulting correlations between these degrees of freedom can be investigated with correlations functions traditionally employed in quantum mechanics, such as the well-known Clauser-Horne-Shimony-Holt (CHSH) correlation function. In this paper we present results achieving a maximal violation of Tsirelson's bound on CHSH correlations between spatial and polarization degrees of freedom of classical (Maxwell) fields. We describe the theoretical method, based on the realization of a nonunitary gate, and then proceed to its experimental implementation carried out with classical optical techniques. Our approach relies on the realization at the level of classical Maxwell fields of a so-called POVM (positive operator valued measure) which is traditionally discussed in the realm of quantum physics.
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PhysRevA.93.053829.pdf
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N. Sandeau, Hassan Akhouayri, A. Matzkin, Thomas Durt. Experimental violation of Tsirelson's bound by Maxwell fields. Physical Review A, American Physical Society, 2016, 93 (5), pp.053829. ⟨10.1103/PhysRevA.93.053829⟩. ⟨hal-01321140⟩

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