论文标题
基于不确定性关系的混合国家的强烈纠缠标准
Strong entanglement criteria for mixed states, based on uncertainty relations
论文作者
论文摘要
我们提出了一个纠缠标准，该标准是根据不确定性关系和Wigner-yanase偏斜信息而专门为混合状态设计的。这种不确定性关系中的差异不涉及任何经典的混合不确定性，因此事实证明纯粹具有量子机械性质。我们表明，任何混合的纠缠状态都可以以我们的标准为特征。我们证明了它对包括Werner国家在内的几种广义混合纠缠状态的实用性，事实证明，它比确定纠缠相关参数的正确域时要比任何其他已知标准都更强。拟议的标准减少了Schrodinger-Robertson对纯状态的不平等。
We propose an entanglement criterion, specially designed for mixed states, based on uncertainty relation and the Wigner-Yanase skew information. The variances in this uncertainty relation does not involve any classical mixing uncertainty, and thus turns out to be purely of quantum mechanical nature. We show that any mixed entangled state can be characterized by our criterion. We demonstrate its utility for several generalized mixed entangled state including Werner states and it turns out to be stronger than any other known criterion in identifying the correct domain of relevant parameters for entanglement. The proposed criterion reduces to the Schrodinger-Robertson inequality for pure states.
