Perspective: Reproducible Coherence Characterization of Superconducting Quantum Devices

TL;DR

This paper discusses the importance of accurate, reproducible performance metrics for superconducting quantum devices to enable effective optimization and comparison across labs, highlighting current challenges and future research needs.

Contribution

It provides a comprehensive overview of error analysis in superconducting quantum circuits and outlines future directions for improving reproducibility and device optimization.

Findings

Current error analysis methods are insufficient for accurate device comparison

Reproducibility issues hinder large-scale quantum device optimization

Future research is needed to standardize performance metrics

Abstract

As the field of superconducting quantum computing approaches maturity, optimization of single-device performance is proving to be a promising avenue towards large-scale quantum computers. However, this optimization is possible only if performance metrics can be accurately compared among measurements, devices, and laboratories. Currently such comparisons are inaccurate or impossible due to understudied errors from a plethora of sources. In this Perspective, we outline the current state of error analysis for qubits and resonators in superconducting quantum circuits, and discuss what future investigations are required before superconducting quantum device optimization can be realized.