海森堡XYZ自旋链系统的热纠缠与局域量子不确定性研究

研究了热平衡温度，自旋交换相互作用，Dzyaloshinskii-Moriya(DM)相互作用及外加非一致性磁场对两比特海森堡XYZ自旋链量子系统的热纠缠与局域量子不确定度的影响，对比分析了并发度量子纠缠与局域量子不确定度描述自旋链系统量子关联的差别.结果表明自旋链系统的量子纠缠在热平衡温度，DM相互作用及外加磁场的非一致性参数的变化情况下均会出现纠缠突然死亡的再生现象，而自旋链系统的局域量子不确定度随着这些参数呈连续变化现象.并且，自旋交换相互作用，DM相互作用及外加横向磁场作用强度较小时，他们的变化对自旋链系统的量子纠缠与局域量子不确定度的影响有着明显的差别.

Thermal quantum entanglement and local quantum uncertainty of the two-qubit Heisenberg XYZ spin chain system

The influences of thermal equilibrium temperature, spins exchange interaction, Dzyaloshinskii-Moriya (DM) interaction and z-component external inhomogeneous magnetic fields on the thermal quantum entanglement and local quantum uncertainty of the two-qubit Heisenberg XYZ spin chain system have been investigated. We have made a comparative analysis of thermal quantum entanglement and local quantum uncertainty for characterizing the quantum correlations of two-qubit Heisenberg XYZ spin chain system. The results show that the variations of thermal equilibrium temperature, DM interaction and anisotropic parameter of inhomogeneous magnetic fields can lead to sudden death and birth of quantum entanglement. While these phenomena cannot appear for the quantum correlations characterized by local quantum uncertainty. Meanwhile, there are vast differences of thermal quantum entanglement and local quantum uncertainty at the smaller strengths of spins exchange interaction, DM interaction and external magnetic fields.