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A fast and accurate computational method for the linear-combination-based isotropic periodic sum.
Kazuaki Z Takahashi1, Takuma Nozawa2, Kenji Yasuoka2
1Research Center for Computational Design of Advanced Functional Materials, National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8568, Japan. kazu.takahashi@aist.go.jp.
Scientific Reports
|August 10, 2018
Summary
A new LIPS/FFT method speeds up molecular simulations by efficiently calculating intermolecular interactions. This approach maintains high accuracy, making it suitable for various molecular systems.
Area of Science:
- Computational chemistry
- Molecular dynamics
- Statistical mechanics
Background:
- Isotropic periodic sum (IPS) methods are crucial for calculating intermolecular interactions in periodic systems.
- The linear-combination-based IPS (LIPS) offers high accuracy but suffers from high computational cost due to real-space long-range interactions.
- This computational burden limits its application in long-time molecular simulations.
Purpose of the Study:
- To develop a computationally efficient yet accurate method for calculating intermolecular interactions in molecular systems.
- To address the performance bottleneck of the original LIPS method in long-time molecular simulations.
- To evaluate the performance of a combined LIPS and fast Fourier transform (FFT) approach.
Main Methods:
- Developed a hybrid LIPS/FFT algorithm combining LIPS with fast Fourier transform techniques.
- Evaluated the LIPS/FFT method on both homogeneous and heterogeneous molecular systems.
- Compared the computational efficiency and accuracy against established methods like Ewald summation and smooth particle mesh Ewald.
Main Results:
- The LIPS/FFT approach achieved computational efficiency comparable to smooth particle mesh Ewald.
- The method maintained the high accuracy characteristic of the original LIPS.
- Successful application demonstrated on diverse molecular system types.
Conclusions:
- The LIPS/FFT method significantly enhances the computational speed of IPS techniques.
- This approach offers a balance of high accuracy and computational efficiency for molecular simulations.
- LIPS/FFT holds great potential for advancing the study of a wide range of molecular systems.
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