论文标题
Qubit-Qudit纠缠证人的非线性改进
Nonlinear Improvement of Qubit-qudit Entanglement Witnesses
论文作者
论文摘要
纠缠证人是一种重要且具有实验性的适用于纠缠检测的工具。在本文中，我们为$ 2 $ Quantum Systems的任何纠缠证人提供了非线性改进。与任何现有的纠缠见证人相比，提高的可分离性标准只需要对本地观察物进行两次测量。采用详细的例子来说明一般，最佳和不可兼容的纠缠证人的非线性改善的效率。
The entanglement witness is an important and experimentally applicable tool for entanglement detection. In this paper, we provide a nonlinear improvement of any entanglement witness for $2\otimes d$ quantum systems. Compared with any existing entanglement witness, the improved separability criterion only needs two more measurements on local observables. Detailed examples are employed to illustrate the efficiency of the nonlinear improvement for general, optimal and non-decomposable entanglement witnesses.
