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Quantum Chemistry Common Driver and Databases (QCDB) and Quantum Chemistry Engine (QCEngine): Automation and
Daniel G A Smith1, Annabelle T Lolinco2, Zachary L Glick3
1Molecular Sciences Software Institute, Blacksburg, Virginia 24060, USA.
Community efforts in computational molecular sciences (CMS) are advancing with modular interfaces. The Quantum Chemistry Common Driver and Databases (QCDB) project enhances software interoperability for broader functionality.
Area of Science:
- Computational molecular sciences
- Quantum chemistry
- Software engineering
Background:
- Community efforts in computational molecular sciences (CMS) are shifting towards modular, open, and interoperable interfaces.
- Existing community codes often lack the composability and extended functionality achievable through integrated systems.
Purpose of the Study:
- To introduce the Quantum Chemistry Common Driver and Databases (QCDB) project.
- To demonstrate how an application programming interface (API) can facilitate interoperability across diverse quantum chemistry software packages.
Main Methods:
- Integration of multiple CMS programs (CFOUR, GAMESS, NWChem, OpenMM, Psi4, Qcore, TeraChem, Turbomole) via an API.
- Development of common computational functions (energy, gradient, Hessian) and molecular property analyses (atomic charges, vibrational frequencies).
- Collaboration with the Molecular Sciences Software Institute and their Quantum Chemistry Archive ecosystem.
Main Results:
- Established an API enabling interoperability between various quantum chemistry software packages.
- Provided common computational functions and molecular property analyses.
- Facilitated end-to-end interoperable programming for complex computations.
Conclusions:
- The QCDB project, through its API, enhances modularity and composability in CMS.
- Adoption of these APIs lowers the barrier for standard and power users by standardizing input and data layout.
- The developed system promotes best practices by default, enabling more sophisticated and integrated computational workflows.
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