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9 November 2018 Nonclassicality and entanglement for continuous-variable quantum information
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Abstract
We present how nonclassicality and entanglement can be characterized and detected efficiently for continuous variable systems. Of particular interest is the use of homodyne detections to measure quadrature amplitudes at minimum level to confirm nonclassicality and entanglement beyond Gaussian states. We introduce a systematic method for a functional form of uncertainty relations, which can be efficiently employed to experimentally detect non-Gaussian states comprehensively. Our approach for quantum correlations unifies a framework for quantum entanglement and quantum steering, which include the known results for Gaussian states and provides a better tool for non-Gaussian states than existing methods, e.g. entropic uncertainty relations.
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Hyunchul Nha, Jaehak Lee, and Jiyong Park "Nonclassicality and entanglement for continuous-variable quantum information", Proc. SPIE 10825, Quantum and Nonlinear Optics V, 108250F (9 November 2018); https://doi.org/10.1117/12.2500793
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