论文标题
非对称X状态的局部可用量子相关性
Local available quantum correlations of non-symmetric X states
论文作者
论文摘要
分析了Mundarain等人所定义的局部可用量子相关性（LAQC），分析了非对称2 Qubit X状态的局部可用量子相关性，即在子系统交换下并非不变的X型状态，因此具有局部Bloch载体的规范不同。获得了其LAQC量词的简单分析表达。例如，我们分析了Werner状态和一般X状态的振幅阻尼通道的局部应用。尽管这种局部量子通道在某些情况下可能会产生量子不一致，但LAQC不可能进行这种结果，LAQC暗示了其在LOCC操作下的单调性。这项工作以及我们先前针对所谓的对称和反对称X状态的结果，完成了针对2 Qubit X状态的LAQC量词的精确分析表达式的追求。
Local available quantum correlations (LAQC), as defined by Mundarain et al., are analyzed for non-symmetric 2-qubit X states, that is, X-states that are not invariant under the exchange of subsystems and therefore have local Bloch vectors whose norms are different. A simple analytic expression for their LAQC quantifier is obtained. As an example, we analyze the local application of the amplitude damping channel for Werner states and general X states. Although this local quantum channel can create quantum discord in some cases, no such outcome is possible for LAQC, which hints toward their monotonicity under LOCC operations. This work, along with our previous result for so-called symmetric and anti-symmetric X states, completes the pursuit of exact analytical expressions for the LAQC quantifier for 2-qubit X states.
