论文标题
联合可分离数值范围和两分纠缠见证人
Joint separable numerical range and bipartite entanglement witness
论文作者
论文摘要
2017年，一个考虑了一对遗传学产品表格的想法，称为超级纠缠的目击者。在2018年，给出了一些严格的结果。在这里，我们改善了他们的工作。首先，我们指出这个想法可以直接来自一个名为“可分离数值范围”的早期概念，并解释其作为一系列证人的工作方式。其次，通过一种简单的方法，我们为有效对提供了足够的条件。最后，我们证明这种情况是优化所必需的。
In 2017 an idea considering a pair of Hermitian operators of product form was published, which is called ultrafine entanglement witnessing. In 2018 some rigorous results were given. Here we improve their work. First we point this idea can be directly derived from an earlier concept named joint separable numerical range and explain how it works as a series of witnesses. Second by a simple method we present a sufficient condition for an effective pair. Finally we prove this condition is necessary for optimization.
