论文标题
从旋转玻色子模型中相互作用的两量动力学的推导
Derivation of Interacting Two-Qubit Dynamics from Spin-Boson Model
论文作者
论文摘要
我们从旋转玻色子模型中得出了用于相互作用的两旋态的运动方程，以便检查量子计算机中的量子动力学。根据复合操作员方法，我们为开放量子系统开发了Caldeira-Leggett方法，以便可以采用源自两旋旋转相关性的纠缠动态。我们证明了时间依赖于两旋动力学的数值结果。我们发现，总自旋的放松是通过磁性材料的landau-lifshitz-gilbert方程的量子版本来描述的。我们还发现，即使完全旋转完全放松，两旋复合模式也可以保持振荡。因此，我们得出的结论是，由于复合模式的存在引起的两旋相关性是稳定的，反对耗散。我们考虑了为什么保持相关性的机制。
We derive damping equations of motion for interacting two-spin states from a spin-boson model in order to examine qubit dynamics in quantum computers. On the basis of the composite operator method, we develop the Caldeira-Leggett approach for open quantum systems so that the entanglement dynamics originated from the two-spin correlation can be taken. We demonstrate numerical results for time dependence on the two-spin dynamics. We find that the relaxation of the total spin is described by a quantum version of the Landau-Lifshitz-Gilbert equation for magnetic materials. We also find that a two-spin composite mode keeps oscillation even after the total spin has been fully relaxed. We thus conclude that the two-spin correlation due to the presence of the composite mode is stable against dissipation. We consider the mechanism of why the correlation is maintained.
