Detection of temporal fluctuation in superconducting qubits for quantum error mitigation

Yuta Hirasaki; Shunsuke Daimon; Toshinari Itoko; Naoki Kanazawa; Eiji Saitoh

doi:10.1063/5.0166739

Detection of temporal fluctuation in superconducting qubits for quantum error mitigation

Quantum Physics 2024-03-15 v1

Authors: Yuta Hirasaki , Shunsuke Daimon , Toshinari Itoko , Naoki Kanazawa , Eiji Saitoh

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Abstract

We have investigated instability of a superconducting quantum computer by continuously monitoring the qubit output. We found that qubits exhibit a step-like change in the error rates. This change is repeatedly observed, and each step persists for several minutes. By analyzing the correlation between the increased errors and anomalous variance of the output, we demonstrate quantum error mitigation based on post-selection. Numerical analysis on the proposed method was also conducted.

Keywords

fault-tolerant quantum computation superconducting qubits quantum error mitigation

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@article{arxiv.2307.04337,
  title  = {Detection of temporal fluctuation in superconducting qubits for quantum error mitigation},
  author = {Yuta Hirasaki and Shunsuke Daimon and Toshinari Itoko and Naoki Kanazawa and Eiji Saitoh},
  journal= {arXiv preprint arXiv:2307.04337},
  year   = {2024}
}

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5 pages, 4 figures

Detection of temporal fluctuation in superconducting qubits for quantum error mitigation

Abstract

Keywords

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