论文标题
双Quibent状态的限制关系和并发性之间的关系
Constraint relation between steerability and concurrence for two-qubit states
论文作者
论文摘要
纠缠和转向用于描述量子不可分割性。可协调的国家构成严格的纠缠状态。关于一个普遍的两倍纠缠状态的领土可管道性占据了多少区域的纠缠，这是一个自然的问题。在这项工作中，我们通过使用两种进化状态和随机生成的两量态状态来研究可置与并发之间的约束关系。通过结合理论和数值证明，我们获得了可识别性的上限和下边界。下边界可以用作转向检测的足够标准。 futhermore，我们考虑了一种特殊的混合状态，它通过对Werner样状态进行任意单一操作，并提出了一个由同意和纯度描述的足够的转向标准。
Entanglement and steering are used to describe quantum inseparabilities. Steerable states form a strict subset of entangled states. A natural question arises concerning how much territory steerability occupies entanglement for a general two-qubit entangled state. In this work, we investigate the constraint relation between steerability and concurrence by using two kinds of evolutionary states and randomly generated two-qubit states. By combining the theoretical and numerical proofs, we obtain the upper and lower boundaries of steerability. And the lower boundary can be used as a sufficient criterion for steering detection. Futhermore, we consider a special kind of mixed state transformed by performing an arbitrary unitary operation on Werner-like state, and propose a sufficient steering criterion described by concurrence and purity.
