ANKH: A Generalized O(N) Interpolated Ewald Strategy for Molecular Dynamics Simulations

Area of Science:

• Computational Chemistry
• Molecular Dynamics Simulations
• High-Performance Computing

Background:

• Particle Mesh Ewald (PME) using Fast Fourier Transforms (FFTs) is standard for electrostatics in MD simulations but suffers from poor scalability on supercomputers.
• FFT-free Fast Multipole Methods (FMM) scale well for large systems but lack performance for small- to medium-sized systems.

Purpose of the Study:

• To develop a new computational strategy for electrostatics evaluation in molecular dynamics.
• To overcome the scalability and performance limitations of existing methods like PME and FFT-free FMM for all system sizes.

Main Methods:

• Introduced ANKH, a method based on interpolated Ewald summations.
• Generalized ANKH for distributed point multipoles and induced dipoles.
• Designed ANKH for high-performance simulations with polarizable force fields.

Main Results:

• ANKH demonstrates efficiency and scalability for molecular dynamics simulations across all system sizes.
• The method is suitable for next-generation polarizable force fields and exascale computing.

Conclusions:

• ANKH provides a unified and efficient approach to electrostatics calculations in molecular dynamics.
• This method enhances the applicability of advanced force fields and pushes the boundaries of computational chemistry for large-scale simulations.