论文标题
液体氦上量子点中的自旋动力学
Spin dynamics in quantum dots on liquid helium
论文作者
论文摘要
液体HE-4没有磁性缺陷，使其成为具有长寿命态态的电子的理想底物。这样的国家可以用作Qubit国家。在这里，我们考虑电子的自旋状态静态位于氦表面上的量子点中。该系统中有效的门操作需要自旋轨道耦合。它可以通过电流携带线的非均匀磁场创建，可以打开和关闭，并允许人们获得大型的电偶极力矩，并在相邻点中旋转相对快速的耦合。至关重要的是了解由于自旋轨道耦合而引起的自旋衰变。我们建立了这种衰变的主要机制，并表明衰减足够慢，可以实现高保真性单位和两倍的门操作
Liquid He-4 is free from magnetic defects, making it an ideal substrate for electrons with long-lived spin states. Such states can serve as qubit states. Here we consider the spin states of electrons electrostatically localized in quantum dots on a helium surface. Efficient gate operations in this system require spin-orbit coupling. It can be created by a nonuniform magnetic field from a current-carrying wire, can be turned on and off, and allows one to obtain large electro-dipole moment and comparatively fast coupling of spins in neighboring dots. Of central importance is to understand the spin decay due to the spin-orbit coupling. We establish the leading mechanism of such decay and show that the decay is sufficiently slow to enable high-fidelity single- and two-qubit gate operations
