Detection of temporal fluctuation in superconducting qubits for quantum error mitigation

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.

arXiv comment5 pages, 4 figures

References in corpus (30)

• Quantum Computing in the NISQ era and beyond
• Quantum Computing
• Charge insensitive qubit design derived from the Cooper pair box
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• A Quantum Engineer's Guide to Superconducting Qubits
• Noisy intermediate-scale quantum (NISQ) algorithms
• Superconducting Qubits: Current State of Play
• Error mitigation for short-depth quantum circuits
• Dynamical decoupling and noise spectroscopy with a superconducting flux qubit
• Extending the computational reach of a noisy superconducting quantum processor
• Decoherence in Josephson Qubits from Dielectric Loss
• Validating quantum computers using randomized model circuits
• Maintaining coherence in Quantum Computers
• Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
• Towards understanding two-level-systems in amorphous solids -- Insights from quantum circuits
• A blueprint for demonstrating quantum supremacy with superconducting qubits
• Fluctuations of Energy-Relaxation Times in Superconducting Qubits
• Decoherence benchmarking of superconducting qubits
• Probabilistic error cancellation with sparse Pauli-Lindblad models on noisy quantum processors
• Impact of ionizing radiation on superconducting qubit coherence
• Correlating decoherence in transmon qubits: Low frequency noise by single fluctuators
• Scalable error mitigation for noisy quantum circuits produces competitive expectation values
• Low- and high-frequency noise from coherent two-level systems
• Interacting two-level defects as sources of fluctuating high-frequency noise in superconducting circuits
• Two-level systems in superconducting quantum devices due to trapped quasiparticles
• TLS Dynamics in a Superconducting Qubit Due to Background Ionizing Radiation
• Microscopic Model of Critical Current Noise in Josephson Junctions
• Analyzing the impact of time-correlated noise on zero-noise extrapolation
• Multi-qubit time-varying quantum channels for NISQ-era superconducting quantum processors
• Mitigating errors by quantum verification and post-selection

Cited by in corpus (6)

• Robust estimation of the Quantum Fisher Information on a quantum processor
• Practical techniques for high-precision measurements on near-term quantum hardware and applications in molecular energy estimation
• Dynamics of measurement-induced state transitions in superconducting qubits
• Error-Mitigated Quantum Routing on Noisy Devices
• Error Mitigation of BQP Computations using Measurement-Based Verification
• Shift of quantum critical point of discrete time crystal on a noisy quantum simulator