KQCircuits – open-source EDA software for designing chips with super conducting qubits

• Speaker(s): Pavel Smirnov
• email: pavel.smirnov@meetiqm.com

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Abstract

KQCircuits is an open-source framework for designing superconducting circuit geometry, implemented as a plug-in to KLayout (https://www.klayout.de/), which is a CAD tool for viewing and creating 2-dimensional multilayer designs. KQCircuits provides several utilities to support most of the design process of a Quantum Processor Unit (QPU). KQCircuits has a Python library to aid geometry design and promote parametrized design to enable scalability and reusability. KQCircuits also includes an extensive library of pre-made, commonly used elements to drag-and-drop into a custom QPU, as well as some ready-made QPUs for reference or to include in the manufactured wafer for benchmarking purposes. The composition of the mask design is handled by KQCircuits as well by taking a set of desired chips and placing copies of them in a grid structure within a circle wafer. KQCircuits also provides a suite of verification tools to detect errors and mistakes before initiating the fabrication process, including a set of Design Rule Checks and the ability to export a netlist of the design. KQCircuits can also be integrated with third-party simulation tools to perform further design validation and study of physical features such as capacitance. One of such tools being Elmer FEM , an open-source finite-element solver developed by CSC Finland, with whom we have a strong collaboration.

Software

General information

• Repository: https://github.com/iqm-finland/KQCircuits
• Main documentation website: https://iqm-finland.github.io/KQCircuits/

Interfaces with following open-source tools

• KLayout (https://www.klayout.de)
• Elmer (https://www.csc.fi/fi/web/elmer)
• XSection (https://wiki.f-si.org/index.php?title=KLayout_XSection_tool_-_Deep_insights_or_nonsense_in_colors%3F)