PIF: Few Electron Logical Qubits and Cross Chip Shuttling of Quantum Information

该研究项目围绕制作介观少电子器件，以实验测试少电子自旋量子比特的相干控制和穿梭，自旋和位置信息将通过位于量子点附近的量子点接触监听器件来确定。高频脉冲将被用来控制和转移电子之间的不同位置。拟议的研究项目的整体重要性是扩大我们的理解的限制因素，决定自旋相干寿命的固定和飞行的少数电子自旋量子比特。在固态下，电子之间以及电子与基质材料之间的复杂相互作用导致了退相干。在GaAs中，自旋退相干是由电子与宿主核之间的超精细相互作用引起的。在这里，我们将使用由几个电子量子比特提供的更高程度的对称性来克服这种退相干源。

The research project centers around producing mesoscopic few electron devices inorder to experimentally test coherent control and shuttling of few electron spin qubits.The spin and position information will be determined using quantum point contactlistening devices situated adjacent to the quantum dots. High frequency pulses will beused in order to control and transfer electrons among the different locations.The overall importance of the proposed research project is to extend our understandingof the limiting factors that determine spin coherence lifetime of stationary and flying fewelectron spin qubits. In the solid state, complicated interactions among electrons andbetween the electrons and their host material result in decoherence. In GaAs, spindecoherence is caused by the hyperfine interactionsbetween the electron and the host nuclei. Here we shall use the higher degree ofsymmetry offered by few electron qubits in order to overcome such sources ofdecoherence.