cp2k/cp2k
Nov 2025 – Feb 2026
3 Months active
Languages Used
Fortran
Technical Skills
Fortran programmingmatrix operationsnumerical methodsparallel programmingquantum mechanicsscientific computing
Dmitry Ryndyk
PROFILE
Dmitry Ryndyk
Dmitry Ryndyk enhanced the NEGF module in the cp2k/cp2k repository by developing features that improve the accuracy, reliability, and scalability of quantum transport simulations. He implemented advanced matrix operations in Fortran to refine Fermi level calculations, enable restart capabilities for electrode and scattering region matrices, and align energy references across electrodes. His work addressed memory management issues, improved parallel programming performance, and reduced log noise, resulting in more robust and reproducible scientific computing workflows. By focusing on numerical methods and data persistence, Dmitry’s contributions increased simulation resilience, facilitated debugging, and laid the foundation for future fault-tolerant large-scale runs.
Overall Statistics
Feature vs Bugs
57%Features
Repository Contributions
10Total
Bugs
3
Commits
10
Features
4
Lines of code
6,029
Activity Months3
Your Network
56 peopleSame Organization
@tu-dresden.de8
Shared Repositories
48
Work History
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026: cp2k/cp2k delivered a key feature in the NEGF module that enhances simulation resilience and reproducibility. The NEGF Restart File I/O for Scattering Region Matrices adds capabilities to read and write restart files for the scattering region's Hamiltonian and overlap matrices, enabling simulations to resume from previous states and improving reliability of long-running runs. This work lays the groundwork for fault tolerance and easier debugging in large-scale production runs. Commit reference: 6bd5426dd71c64d360325e89aad0824be8e44b69.
1 Commits • 1 Features
Feb 1, 2026February 2026: cp2k/cp2k delivered a key feature in the NEGF module that enhances simulation resilience and reproducibility. The NEGF Restart File I/O for Scattering Region Matrices adds capabilities to read and write restart files for the scattering region's Hamiltonian and overlap matrices, enabling simulations to resume from previous states and improving reliability of long-running runs. This work lays the groundwork for fault tolerance and easier debugging in large-scale production runs. Commit reference: 6bd5426dd71c64d360325e89aad0824be8e44b69.
February 2026
December 2025
4 Commits • 2 Features
Dec 1, 2025Monthly summary for 2025-12 focusing on NEGF enhancements in cp2k/cp2k. Key features delivered include improved Fermi level computation and energy alignment across electrodes with enhanced logging, plus restart capabilities for electrode matrices to enable data persistence across simulations. A memory management bug fix addresses a memory leak in NEGF methods, improving stability during long runs. The work emphasizes business value through more robust, traceable, and reusable simulation workflows.
December 2025
4 Commits • 2 Features
Dec 1, 2025Monthly summary for 2025-12 focusing on NEGF enhancements in cp2k/cp2k. Key features delivered include improved Fermi level computation and energy alignment across electrodes with enhanced logging, plus restart capabilities for electrode matrices to enable data persistence across simulations. A memory management bug fix addresses a memory leak in NEGF methods, improving stability during long runs. The work emphasizes business value through more robust, traceable, and reusable simulation workflows.
November 2025
5 Commits • 1 Features
Nov 1, 2025Summary for 2025-11: Delivered targeted NEGF enhancements in the cp2k/cp2k module focused on accuracy, reliability, and scalability of transport simulations. Key features include centering contact coordinates and improved electrode Hamiltonian extraction, refined Fermi level calculation, and matrix desymmetrization for spin components. Fixed logging noise in verbose atom-mapping output. Resolved finite-voltage implementation and MPI accuracy issues to improve parallel performance and result fidelity. These changes increase trust in device simulations, reduce post-processing debugging, and enable more efficient benchmarking and iteration.
5 Commits • 1 Features
Nov 1, 2025Summary for 2025-11: Delivered targeted NEGF enhancements in the cp2k/cp2k module focused on accuracy, reliability, and scalability of transport simulations. Key features include centering contact coordinates and improved electrode Hamiltonian extraction, refined Fermi level calculation, and matrix desymmetrization for spin components. Fixed logging noise in verbose atom-mapping output. Resolved finite-voltage implementation and MPI accuracy issues to improve parallel performance and result fidelity. These changes increase trust in device simulations, reduce post-processing debugging, and enable more efficient benchmarking and iteration.
November 2025
Activity
Loading activity data...
Quality Metrics
Correctness88.0%
Maintainability82.0%
Architecture84.0%
Performance80.0%
AI Usage28.0%
Skills & Technologies
Programming Languages
Fortran
Technical Skills
FortranFortran programmingmatrix operationsmemory managementnumerical methodsparallel programmingquantum mechanicsscientific computing
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline