论文标题
单孔量子点的二维阵列
A two-dimensional array of single-hole quantum dots
论文作者
论文摘要
使用与半导体制造兼容的技术和材料制造的量子点有望用于量子信息处理。尽管在线性排列中定位的量子点的高保真控制方面取得了长足的进步，但沿二维的可伸缩性是迈向实用量子信息处理的关键步骤。在这里，我们演示了一个二维量子点阵列，其中每个量子点都调整为单个充电占用率，并通过使用两个集成的射频电荷传感器同时测量来验证。我们通过使用低疾病和较小的有效质量的平面锗量子点来实现这一目标，从而使专用的屏障大门合并来控制量子点的耦合。我们证明了与Fock-Darwin光谱一致的孔电荷填充，并表明我们可以从孤立的量子点调整单孔量子点到强烈交换耦合的量子点。这些结果激发了将平面锗量子点用作量子模拟和计算的构件。
Quantum dots fabricated using techniques and materials that are compatible with semiconductor manufacturing are promising for quantum information processing. While great progress has been made toward high-fidelity control of quantum dots positioned in a linear arrangement, scalability along two dimensions is a key step toward practical quantum information processing. Here we demonstrate a two-dimensional quantum dot array where each quantum dot is tuned to single-charge occupancy, verified by simultaneous measuring with two integrated radio frequency charge sensors. We achieve this by using planar germanium quantum dots with low disorder and small effective mass, allowing the incorporation of dedicated barrier gates to control the coupling of the quantum dots. We demonstrate hole charge filling consistent with a Fock-Darwin spectrum and show that we can tune single-hole quantum dots from isolated quantum dots to strongly exchange coupled quantum dots. These results motivate the use of planar germanium quantum dots as building blocks for quantum simulation and computation.
