论文标题
用于超导量子读数的模拟方法
A Simulation Methodology for Superconducting Qubit Readout Fidelity
论文作者
论文摘要
Qubit读数是任何量子计算机的关键部分，包括基于超导量的计算机。读数保真度受读数脉冲宽度，读取脉冲能量，谐振器设计，Qubit设计，Qubit-resonator耦合以及沿读取路径产生的噪声的影响。因此，重要的是要根据沿读取路径的各种设计参数进行建模和预测保真度。在这项工作中，建议使用MATLAB和ANSYS HFSS提出和实施用于超导量子读数订货的仿真方法，以允许在读取路径中进行竞选。例如，参数是从实际的基于Qubit-Qubit的量子计算机中获取的，并将模拟校准到一个实验点。然后，它用于预测系统的读数误差，这是读取脉冲宽度和功率的函数，结果良好与实验相匹配。发现即使输入功率降低了7dB，或者读取脉冲宽度较窄，该系统仍然可以保持高忠诚度。这可用于指导超导量子读数系统的设计和优化。
Qubit readout is a critical part of any quantum computer including the superconducting-qubit-based one. The readout fidelity is affected by the readout pulse width, readout pulse energy, resonator design, qubit design, qubit-resonator coupling, and the noise generated along the readout path. It is thus important to model and predict the fidelity based on various design parameters along the readout path. In this work, a simulation methodology for superconducting qubit readout fidelity is proposed and implemented using Matlab and Ansys HFSS to allow the co-optimization in the readout path. As an example, parameters are taken from an actual superconducting-qubit-based quantum computer and the simulation is calibrated to one experimental point. It is then used to predict the readout error of the system as a function of readout pulse width and power and the results match the experiment well. It is found that the system can still maintain high fidelity even if the input power is reduced by 7dB or if the readout pulse width is 40% narrower. This can be used to guide the design and optimization of a superconducting qubit readout system.
