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Enabling large-scale quantum path integral molecular dynamics simulations through the integration of D<scp>cdftbmd</scp> and i-PI codes
- Source :
- The Journal of Chemical Physics. 158
- Publication Year :
- 2023
- Publisher :
- AIP Publishing, 2023.
-
Abstract
- A large-scale quantum chemical calculation program, Dcdftbmd, was integrated with a Python-based advanced atomistic simulation program, i-PI. The implementation of a client–server model enabled hierarchical parallelization with respect to replicas and force evaluations. The established framework demonstrated that quantum path integral molecular dynamics simulations can be executed with high efficiency for systems consisting of a few tens of replicas and containing thousands of atoms. The application of the framework to bulk water systems, with and without an excess proton, demonstrated that nuclear quantum effects are significant for intra- and inter-molecular structural properties, including oxygen–hydrogen bond distance and radial distribution function around the hydrated excess proton.
- Subjects :
- General Physics and Astronomy
Physical and Theoretical Chemistry
Subjects
Details
- ISSN :
- 10897690 and 00219606
- Volume :
- 158
- Database :
- OpenAIRE
- Journal :
- The Journal of Chemical Physics
- Accession number :
- edsair.doi...........f4107fb80ece73156737d498b7e8b68c