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Theoretical and Experimental Characterization of Entropic Inequalities

机译:熵不等式的理论和实验表征

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Nonlinear inequalities based on the quadratic Renyi entropy for mixed two-qubit states are characterized on the Entropy-Concurrence plane. This class of inequalities is stronger than Clauser-Horne-Shimony-Holt (CHSH) inequalities and, in particular, are violated “in toto” by the set of Type I Maximally-Entangled-Mixture States (MEMS I). Renyi entropy is experimentally obtained by local measurements on two pairs of polarization-entangled photons. The novel “phase marking” technique allows the selection of uncorrupted outcomes even with nondeterministic sources of entangled photons. Experimental data demonstrate the violation of entropic inequalities which are an example of nonlinear entanglement witnesses.
机译:基于混合双量标状态的二次仁怡熵的非线性不等式的特征在于熵同时平面。这类不等式比Clauser-Horne-Shimony-Holt(CHSH)不等式强,特别是通过I型最大缠结的混合物状态(MEMS I)侵犯“TOTO中”侵犯。 Renyi熵通过在两对极化缠结的光子上通过局部测量进行实验获得。新颖的“相标记”技术允许选择未腐败的结果,即使具有缠结光子的非术语。实验数据表明侵犯了熵不等式,这是非线性纠缠证人的一个例子。

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