Electromagnetic Feature Extraction in Superconducting Quantum Circuits: An Open-Source Finite-Element Workflow Using Palace

• URL: http://arxiv.org/abs/2511.09041v1
• Date: Thu, 13 Nov 2025 01:27:44 GMT
• Title: Electromagnetic Feature Extraction in Superconducting Quantum Circuits: An Open-Source Finite-Element Workflow Using Palace
• Abstract summary: We present a workflow built around Palace, an open-source, high-performance finite element method solver.<n>We benchmark the workflow on a chip with bare resonators and qubits coupled with readout resonators.<n>Results demonstrate open-source EM tools can match commercial accuracy while offering scalable, license-free analysis.
• Score: 6.569114856706871
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: Accurate electromagnetic (EM) feature extraction, including element characterization, eigenmodes, and field distributions, is essential for superconducting quantum circuit design. To streamline this process, we present a workflow built around Palace, an open-source, high-performance finite element method solver tailored for quantum applications. Starting from circuit layouts, the workflow automates mesh generation, multiple EM solver processing, and EM-to-Hamiltonian post-processing. We benchmark the workflow on a chip with bare resonators and qubits coupled with readout resonators, achieving resonator frequencies prediction within 0.3% and 3 out of 4 external couplings within 16% of cryogenic measurements. These results demonstrate open-source EM tools can match commercial accuracy while offering scalable, license-free analysis. Our Palace-based workflow provides an accessible and extensible foundation for rapid superconducting circuit development and materials-loss studies.

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