论文标题
量子转向的共享性及其与纠缠的关系
Shareability of Quantum Steering and its Relation with Entanglement
论文作者
论文摘要
置换性是纠缠与贝尔非局部性之间的量子相关性的特征。了解如何在不同各方之间共享这些转向相关性，这在确保量子通信协议的安全性方面具有深刻的应用。在这里，我们表明，最多有两个两分的降低了三个量子状态的状态，可以违反三种设置CJWR线性转向不平等，与两个设置线性转向不平等相反。该结果解释说，量子转向相关性具有有限的共享性能，有时甚至可能是一夫一妻。与两个设置测量方案相反，事实证明，三种设置方案对于发展三方转向相关性的共享性更加有用。除了转向相关性的分布外，在这里介绍了降低的两分转向之间的几种关系，在这里介绍了降低状态的两部分纠缠与真正的三方纠缠的不同措施。结果可检测到不同种类的三方纠缠。
Steerability is a characteristic of quantum correlations lying in between entanglement and Bell nonlocality. Understanding how these steering correlations can be shared between different parties has profound applications in ensuring security of quantum communication protocols. Here we show that at most two bipartite reduced states of a three qubit state can violate the three settings CJWR linear steering inequality contrary to two settings linear steering inequality. This result explains that quantum steering correlations have limited shareability properties and can sometimes even be nonmonogamous. In contrast to the two setting measurement scenario, three setting scenario turns out to be more useful to develop deeper understanding of shareability of tripartite steering correlations. Apart from distribution of steering correlations, several relations between reduced bipartite steering, different measures of bipartite entanglement of reduced states and genuine tripartite entanglement are presented here. The results enable detection of different kind of tripartite entanglement.
