自旋轨道相互作用对量子自旋动力学的空间表征
Spatial Analogue of Quantum Spin Dynamics via Spin-Orbit Interaction
摘要：
我们映射电子自旋动力学从时间到空间的量子线与空间均匀和振荡Rashba自旋轨道耦合。自旋-轨道相互作用的存在引入了电子自旋与有效磁场的伪塞曼耦合。我们表明，通过周期性地调制沿量子线轴的自旋轨道耦合，它是可能的，而不需要任何真正的磁场，创建自旋共振的空间模拟。将时间相关操作映射到空间轴上提出了量子信息处理的新模式，其中门操作被编码到材料的能带结构中。我们描述了实现这种材料的纳米线内的界面处的LaAlO 3/SrTiO 3异质结构。
英文摘要：
We map electron spin dynamics from time to space in quantum wires with spatially uniform and oscillating Rashba spin-orbit coupling. The presence of the spin-orbit interaction introduces pseudo-Zeeman couplings of the electron spins to effective magnetic fields. We show that by periodically modulating the spin-orbit coupling along the quantum wire axis, it is possible to create the spatial analogue of spin resonance, without the need for any real magnetic fields. The mapping of time-dependent operations onto a spatial axis suggests a new mode for quantum information processing in which gate operations are encoded into the band structure of the material. We describe a realization of such materials within nanowires at the interface of LaAlO3/SrTiO3 heterostructures.
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