Developing a library of modular superconducting qubit components for rapid device design

As superconducting qubit fabrication advances and devices become increasingly complex, turnaround times for device screenings grow longer and longer and design tolerances become tighter. It is now necessary to have accurate simulations of device performance before fabrication. The standard method uses 3D electromagnetic solvers such as Ansys’s HFSS / Q3D to determine device parameters. However, this can be a major bottleneck in the design process, and can sometimes yield inaccurate results. One potential solution is to create a design library of compact, modularized, and accurately-simulated components that can be combined in a larger design without expensive full chip simulation. We present a workflow combining Ansys EM solvers, parallel high-performance computing, and analytic calculations in order to develop an open-source library of superconducting quantum device components. Our library is an extension of IBM’s Qiskit Metal package. As a demonstration, we present a device incorporating a transmon qubit, a measurement cavity, and a lossy parametric coupler.

Work funded by the NSF under OMA-1936388, the ONR under N00014-21-1-2688, and the RCSA under Cottrell Scholar grant 27550.