论文标题
带有射线的调谐阵列:量子点电荷状态的物理信息调谐状态
Tuning arrays with rays: Physics-informed tuning of quantum dot charge states
论文作者
论文摘要
基于栅极定义的量子点(QD)的量子计算机有望扩展。但是,随着量子位数量的增加,手动校准这些系统的负担变得不合理,必须使用自主调整。最近有一系列关于各种QD参数的自动调整的演示,例如粗门范围,全局状态拓扑(例如单QD,双QD),电荷和隧道与多种方法耦合。在这里,我们演示了一种直观,可靠和数据效率的工具集,用于自动化的全球状态,并在被认为是物理信息的框架中(PIT)中的框架调整。 PIT的第一个模块是一种基于动作的算法,该算法将机器学习分类器与物理知识相结合,以导航到目标全球状态。第二个模块使用一系列一维测量值,首先清空电荷QD,然后校准电容式耦合并导航到目标电荷状态,从而调整目标电荷状态。基于动作的调整的成功率一致地超过了适用于离线测试的模拟和实验数据的95%。在使用模拟数据测试(95.5(5.4)%)测试时,电荷设置的成功率是可比性的,离线实验测试的成功率仅稍差,平均为89.7(17.4)%(中位数为97.5%)。值得注意的是,高性能在学术清洁室和工业300毫米}过程线上的样品中都证明了高性能,进一步强调了坑的设备不可知论。总之,这些对一系列模拟和实验设备的测试证明了PIT的有效性和鲁棒性。
Quantum computers based on gate-defined quantum dots (QDs) are expected to scale. However, as the number of qubits increases, the burden of manually calibrating these systems becomes unreasonable and autonomous tuning must be used. There has been a range of recent demonstrations of automated tuning of various QD parameters such as coarse gate ranges, global state topology (e.g. single QD, double QD), charge, and tunnel coupling with a variety of methods. Here, we demonstrate an intuitive, reliable, and data-efficient set of tools for an automated global state and charge tuning in a framework deemed physics-informed tuning (PIT). The first module of PIT is an action-based algorithm that combines a machine learning classifier with physics knowledge to navigate to a target global state. The second module uses a series of one-dimensional measurements to tune to a target charge state by first emptying the QDs of charge, followed by calibrating capacitive couplings and navigating to the target charge state. The success rate for the action-based tuning consistently surpasses 95 % on both simulated and experimental data suitable for off-line testing. The success rate for charge setting is comparable when testing with simulated data, at 95.5(5.4) %, and only slightly worse for off-line experimental tests, with an average of 89.7(17.4) % (median 97.5 %). It is noteworthy that the high performance is demonstrated both on data from samples fabricated in an academic cleanroom as well as on an industrial 300 mm} process line, further underlining the device agnosticism of PIT. Together, these tests on a range of simulated and experimental devices demonstrate the effectiveness and robustness of PIT.