Incorporating Multi-Qubit Coupling in Superconducting Qubit Modeling

This paper addresses a critical limitation in superconducting qubit modeling by incorporating multi-qubit coupling effects into Maxwell-Schrödinger methods. This is crucial for accurately predicting and optimizing the performance of quantum computers, especially as they scale up. The work provides a rigorous derivation and a new interpretation of the methods, offering a more complete understanding of qubit dynamics and addressing discrepancies between experimental results and previous models. The focus on classical crosstalk and its impact on multi-qubit gates, like cross-resonance, is particularly significant.