Characterizing Superconducting Qubits using Averaged Circuit Eigenvalue Sampling

• URL: http://arxiv.org/abs/2510.02454v1
• Date: Thu, 02 Oct 2025 18:03:38 GMT
• Title: Characterizing Superconducting Qubits using Averaged Circuit Eigenvalue Sampling
• Authors: Tauno Palomaki, Shu Xin Wu, Noah Huffman, Samuel D. Park, James Shackford, Ben DalFavero, Leigh Norris, Ryan Sitler, Paraj Titum, Kevin Schultz,
• Abstract summary: ACES protocol is used to characterize two coupled superconducting qubits.<n>We verify the accuracy of the protocol by comparing the predicted gate fidelities to that extracted from conventional benchmarking approaches.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Efficient characterization of noise during quantum gate operations is an essential step to building and scaling up a quantum computer. One such protocol is averaged circuit eigenvalue sampling (ACES) which efficiently characterizes a noisy gate set by reconstructing a Pauli noise model for a each gate. Here we utilize the ACES protocol to characterize two coupled superconducting qubits. For accurate reconstruction, we tailor the noise via Pauli twirling and account for measurement errors. We verify the accuracy of the protocol by comparing the predicted gate fidelities to that extracted from conventional benchmarking approaches, such as interleaved randomized benchmarking. Furthermore, we demonstrate the efficacy of ACES in accurately identifying specific noise sources by reconstructing injected phase errors in the two-qubit gates.

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