Block-product paired non-Gaussian fermionic states allow efficient classical additive-error approximation of transition amplitudes, overlaps, and high-weight correlators under free-fermionic dynamics using multivariate Pfaffian polynomials.
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A calibration workflow using ELEA and CAFE circuits achieves CZ gate fidelity above 99.9% on an 84-qubit superconducting processor with 0.007% coherent error and median 99.25% across 72 gates.
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Classical simulation of free-fermionic dynamics and quantum chemistry with magic input
Block-product paired non-Gaussian fermionic states allow efficient classical additive-error approximation of transition amplitudes, overlaps, and high-weight correlators under free-fermionic dynamics using multivariate Pfaffian polynomials.
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High-Precision Calibration Workflow Achieves Above $99.9\%$ CZ Gate Fidelity on a Scalable Superconducting Processor
A calibration workflow using ELEA and CAFE circuits achieves CZ gate fidelity above 99.9% on an 84-qubit superconducting processor with 0.007% coherent error and median 99.25% across 72 gates.