论文标题
三角网络中的量子纠缠
Quantum entanglement in the triangle network
论文作者
论文摘要
除了将来的应用外，量子网络还开辟了有趣的基本观点，尤其是新颖的量子相关形式。在这项工作中，我们从基本量子状态及其纠缠的角度讨论了网络中的量子相关性。我们解决了可以在所谓的三角网络中准备哪些状态的问题，该问题由三个由三个来源配对的三个节点组成。我们得出了在这种网络中准备在这种网络中准备的必要标准，考虑到来源在统计上是独立且经典相关的情况。这表明，网络结构对一组准备状态施加了强大和非平凡的约束，这与多部分量子纠缠的标准表征根本不同。
Beyond future applications, quantum networks open interesting fundamental perspectives, notably novel forms of quantum correlations. In this work we discuss quantum correlations in networks from the perspective of the underlying quantum states and their entanglement. We address the questions of which states can be prepared in the so-called triangle network, consisting of three nodes connected pairwise by three sources. We derive necessary criteria for a state to be preparable in such a network, considering both the cases where the sources are statistically independent and classically correlated. This shows that the network structure imposes strong and non-trivial constraints on the set of preparable states, fundamentally different from the standard characterization of multipartite quantum entanglement.
