论文标题
在三种配体自旋结构中的动态成对纠缠和两点相关性
Dynamical pairwise entanglement and two-point correlations in the three-ligand spin-star structure
论文作者
论文摘要
我们通过在动态成对纠缠的框架中，通过均匀的海森堡相互作用（XXX-3LSS）来考虑三位法旋转星形结构。结果表明，中央Qubit“单粒子”状态（COPS）的时间演变导致在周期性的瞬间产生量子W状态。相反，从配体“单粒子”状态（LOPS）的时间演变开始，无法产生W状态。我们还研究了XXX-3LSS中每个元素的两点量子相关性的动力学行为以及不同自旋组件的预期值。发现当生成W状态时，所有量子位之间的并发值相同，源自XX和YY两点量子相关。在相反的情况下，在这些时间瞬间，任意两个量子位之间的Zz量子相关性消失。
We consider the three-ligand spin-star structure through homogeneous Heisenberg interactions (XXX-3LSSS) in the framework of dynamical pairwise entanglement. It is shown that the time evolution of the central qubit "one-particle" state (COPS) results in the generation of quantum W states at periodical time instants. On the contrary, W states cannot be generated from the time evolution of a ligand "one-particle" state (LOPS). We also investigate the dynamical behavior of two-point quantum correlations as well as the expectation values of the different spin-components for each element in the XXX-3LSSS. It is found that when a W state is generated, the same value of concurrence among all qubits arises from xx and yy two-point quantum correlations. On the opposite, zz quantum correlation between any two qubits vanishes at these time instants.
