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Virial Based Berendsen Barostat on GPUs using AMOEBA in Tinker-OpenMM
1Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, United States.
Tinker-OpenMM now calculates the internal virial for AMOEBA force fields on GPUs, enabling pressure control. This breakthrough allows for more accurate molecular dynamics simulations and the integration of advanced barostats.
Area of Science:
- Computational Chemistry
- Molecular Dynamics
- GPU Computing
Background:
- Tinker-OpenMM's prior limitation to Monte Carlo barostats due to missing virial calculations.
- The need for accurate virial calculation in polarizable force fields like AMOEBA for precise simulations.
Purpose of the Study:
- To implement the internal virial calculation for the AMOEBA force field within Tinker-OpenMM on GPUs.
- To demonstrate the capability of Tinker-OpenMM for pressure control using virial calculations.
Main Methods:
- Developed the first GPU implementation of a polarizable internal virial for AMOEBA.
- Integrated the Berendsen barostat into Tinker-OpenMM, utilizing the newly calculated virial.
Main Results:
- Successfully calculated the internal virial for the AMOEBA force field on GPUs.
- Demonstrated accurate pressure control in Tinker-OpenMM through the Berendsen barostat implementation.
Conclusions:
- The implemented internal virial calculation is a significant advancement for Tinker-OpenMM.
- These developments pave the way for incorporating a wider range of barostat algorithms in Tinker-OpenMM for enhanced molecular dynamics simulations.
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