论文标题
Rashba旋转轨道相互作用在半导体纳米线中引起的自旋选择性谐振隧道
Spin-selective resonant tunneling induced by Rashba spin-orbit interaction in semiconductor nanowire
论文作者
论文摘要
我们考虑一个限制在两个静电诱导的QD的系统中的量子线中的单个电子，该QD由附近的大门定义。垂直于量子线的单个GHz频率的时变电场用于诱导RashBA耦合，并在两个相邻电位井之间对电子的自旋依赖性谐振隧穿，其忠诚度超过99.5％。此效果可用于基于自旋的量子计算机中的高保真性全电动电子旋转初始化或读数。与其他自旋初始化方法相反，我们的技术可以绝热地进行，而不会增加电子能量。我们的模拟得到了现实的自洽时间依赖性泊松式计算的支持。
We consider a single electron confined within a quantum wire in a system of two electrostatically-induced QDs defined by nearby gates. The time-varying electric field, of single GHz frequency, perpendicular to the quantum wire, is used to induce the Rashba coupling and enable spin-dependent resonant tunneling of the electron between two adjacent potential wells with fidelity over 99.5%. This effect can be used for the high fidelity all-electrical electron-spin initialization or readout in the spin-based quantum computer. In contrast to other spin initialization methods, our technique can be performed adiabatically without increase in the energy of the electron. Our simulations are supported by a realistic self-consistent time-dependent Poisson-Schroedinger calculations.
