Quantum speed limit and entanglement of a two-spin Heisenberg XYZ system in an inhomogeneous external magnetic field are investigated. The physical system studied is the excess electron spin in two adjacent quantum dots. The influences of magnetic field inhomogeneity as well as spin–orbit coupling are studied. Moreover, the spin interaction with surrounding magnetic environment is investigated as a non-Markovian process. The spin–orbit interaction provides two important features: the formation of entanglement when two qubits are initially in a separated state and the degradation and rebirth of the entanglement.

中文翻译：

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自旋轨道相互作用对耦合量子点中自旋量子位的量子速度限制和纠缠的影响

研究了非均匀外磁场中双自旋海森堡XYZ系统的量子速度极限和纠缠。研究的物理系统是两个相邻量子点中的多余电子自旋。研究了磁场不均匀性和自旋轨道耦合的影响。此外，与周围磁环境的自旋相互作用被研究为非马尔可夫过程。自旋轨道相互作用提供了两个重要特征：当两个量子位最初处于分离状态时形成纠缠以及纠缠的退化和重生。