update_matrix function in virtual dc set

[KU-QM]

Pull Request

Description

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🔧 Refactoring (no functional changes)
• ✅ Test addition/update
• 🎨 Code style/formatting update

Related Issues

Checklist

Code Quality

• My code follows the project's style guidelines
• I have run pre-commit hooks and all checks pass (pre-commit run --all-files)
• My commits follow the Conventional Commits format
• I have performed a self-review of my code
• My changes generate no new warnings

Testing

• I have added tests that prove my fix/feature works
• All new and existing tests pass locally (pytest)
• I have tested my changes with the example scripts (if applicable)

Documentation

• I have updated the documentation (if needed)
• I have added docstrings to new functions/classes
• I have updated the CHANGELOG.md (if applicable)
• I have checked my code and corrected any misspellings

Breaking Changes

Does this PR introduce breaking changes?

Testing Details

Screenshots/Examples

Additional Context

Reviewer Notes