论文标题
量子网络中最大量子
Maximal qubit violation of n-local inequalities in quantum network
论文作者
论文摘要
源独立的量子网络被认为是对贝尔场景的自然概括，在该场景中，我们研究了在网络中分布和测量的量子状态的非局部特性。考虑到最简单的纠缠交换网络，最近Gisin等。 al。和Andreoli等。 al。独立地提供了一组量子状态的系统表征，从而违反了所谓的“双向性”不平等。在这项工作中，我们考虑了量子网络中的复杂性，这些量子网络具有任意数量的链状和星形网络的各方。我们得出了对“ N-Local”不平等的最大侵犯，该不平等是由任意的两分Quibent状态在此类链和星形网络中实现的。这将进一步使我们对复杂结构中的量子相关性有更深入的了解。
Source independent quantum networks are considered as a natural generalization to the Bell scenario where we investigate the nonlocal properties of quantum states distributed and measured in a network. Considering the simplest network of entanglement swapping, recently Gisin et. al. and Andreoli et. al. independently provided a systematic characterization of the set of quantum states leading to violation of the so-called 'bilocality' inequality. In this work, we consider the complexities in the quantum networks with an arbitrary number of parties distributed in chain-shaped and star-shaped networks. We derive the maximal violation of the 'n-local' inequality that can be achieved by arbitrary two-qubit states for such chain and star-shaped networks. This would further provide us deeper understanding of quantum correlations in complex structures.
