Benchmark comparison finds the three-mode Duffing model tracks the circuit-based transmon reference more closely than the effective two-level model for spectra and two-qubit terms, while driven dynamics show multilevel effects absent from the effective model.
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Which Superconducting Qubit Model is Good Enough? From Effective Two-Level to Circuit-Based Hamiltonians for Pulse-Level Simulation
Benchmark comparison finds the three-mode Duffing model tracks the circuit-based transmon reference more closely than the effective two-level model for spectra and two-qubit terms, while driven dynamics show multilevel effects absent from the effective model.