基于推广类W态的纠缠目击构造

A Construction of Entanglement Witnesses Based on Generalized W-Like States Class

摘要: 在量子信息理论中，纠缠的判断是一个重要而棘手的问题，尤其对于高维空间中纠缠态的判断，至今仍然没有一个可操作性强的通用方法。在众多纠缠判断的方法中，纠缠目击因其形式简单且可操作性强而被广泛研究，本文对一类纠缠目击进行了研究，通过改变集合Dk来构造出适用于不同可分类型的纠缠目击，在一定范围下，本文给出的纠缠目击能够判断更多的纠缠态。

Abstract: In quantum information theory, the detection of entanglement is an important and tricky problem, especially for the detection of entangled states in high dimensional space, there is still no general method with strong operability. In many entanglement detective methods, entanglement witness because of its simple form and maneuverability has been widely studied, in this paper, a class of entanglement witness is studied, by changing the set Dk to construct entanglement witness which is suitable for different types of entanglement, to show that under a certain range, the entanglement of the witness presented in this paper can detect more entangled states.