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Caleb Johnson

PROFILE

Caleb Johnson

Over a three-month period, this developer contributed to Qiskit/qiskit-ibm-runtime and Qiskit/documentation by building and enhancing quantum computing tools and documentation. They delivered a Zero Noise Extrapolation module that standardized curve fitting and variance estimation using NumPy and SciPy, simplifying expectation-value processing and reducing code complexity. Their work on gate folding introduced a transpiler pass for noise management, improving circuit reliability and resource efficiency. Additionally, they updated the SQD Getting Started Guide to align with Qiskit v0.10, refining onboarding materials and visualization clarity. Their approach emphasized robust unit testing, technical writing, and backend development in Python and Jupyter Notebook.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

3Total
Bugs
0
Commits
3
Features
3
Lines of code
1,478
Activity Months3

Work History

July 2026

1 Commits • 1 Features

Jul 1, 2026

July 2026: Delivered Zero Noise Extrapolation (ZNE) module for Qiskit/qiskit-ibm-runtime. The module standardizes curve fitting and variance estimation using NumPy/SciPy, introduces a backward-compatible public function for processing expectation values (process_extrapolated_expectation_values), and unifies the fitting workflow to reduce code branches. Implemented a comprehensive unit test suite and updated public documentation. No major bugs fixed this month for this repository; focus was on delivering robust ZNE tooling and laying groundwork for upcoming PEA integration. PR 2889 details and commit inspected: 005f9450790217174f581bcbb664138fe275def4. Co-authored by Samuele Ferracin and dekelmeirom.

June 2026

1 Commits • 1 Features

Jun 1, 2026

June 2026 monthly summary for Qiskit/qiskit-ibm-runtime: Delivered Gate Folding for Noise Management implemented as a transpiler pass to fold specific 2-qubit gates based on a defined noise factor, aiming to improve performance and accuracy of quantum computations. The work included code, tests, and documentation updates, plus a renaming of DEFAULT_FOLDED_GATES to SUPPORTED_* and related cleanups. No explicit major bug fixes were reported this month; stability enhancements came from CI/test improvements and documentation updates. Collaboration included multiple co-authors and code reviews.

June 2025

1 Commits • 1 Features

Jun 1, 2025

June 2025: Documentation-focused sprint for Qiskit/documentation, delivering an updated SQD Getting Started Guide for v0.10 that aligns notebooks and markdown content with the new release, refreshes image outputs, and tunes plotting parameters for clearer visuals, improving onboarding and maintainability.

Activity

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Quality Metrics

Correctness100.0%
Maintainability93.4%
Architecture100.0%
Performance86.6%
AI Usage46.6%

Skills & Technologies

Programming Languages

Jupyter NotebookPython

Technical Skills

DocumentationNumPyPythonQiskitQuantum ComputingSciPyTechnical WritingUnit Testingbackend developmentquantum computingsoftware developmentunit testing

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

Qiskit/qiskit-ibm-runtime

Jun 2026 Jul 2026
2 Months active

Languages Used

Python

Technical Skills

Pythonquantum computingsoftware developmentunit testingNumPyQuantum Computing

Qiskit/documentation

Jun 2025 Jun 2025
1 Month active

Languages Used

Jupyter NotebookPython

Technical Skills

DocumentationQiskitQuantum ComputingTechnical Writing