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controlled-phase 1gate calibration 1pauli-block spectroscopy 1residual zz rotation 1superconducting qubits 1two-qubit gates 1

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quant-ph2026

Branch-resolved Pauli-block spectroscopy of residual conditional phase in two-qubit gates

Xudan Chai, Yanwu Gu, Huiqi Xue +2

The paper introduces a branch‑resolved Pauli‑block spectroscopy technique to directly estimate the signed residual conditional phase (ZZ‑type rotation) in two‑qubit controlled‑phas…