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Gaussian split Ewald: A fast Ewald mesh method for molecular simulation.

Yibing Shan1, John L Klepeis, Michael P Eastwood

  • 1D. E. Shaw Research and Development, New York, NY 10036, USA. yibing.shan@deshaw.com

The Journal of Chemical Physics
|March 3, 2005
PubMed
Summary
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Gaussian split Ewald (GSE) offers a fast and accurate Ewald mesh method. Real-space GSE is competitive with k-space methods for biomolecular simulations and moderate system sizes.

Area of Science:

  • Computational physics
  • Materials science
  • Biomolecular simulations

Background:

  • Ewald mesh methods are crucial for simulating long-range interactions in systems.
  • K-space methods like SPME dominate due to efficiency in typical system sizes.
  • Real-space methods offer asymptotic advantages but have lagged in practical efficiency.

Purpose of the Study:

  • Introduce and evaluate the Gaussian split Ewald (GSE) method.
  • Compare GSE's performance against existing real-space and k-space Ewald methods.
  • Provide a unified framework for understanding Ewald mesh methods.

Main Methods:

  • Developed the Gaussian split Ewald (GSE) method.
  • Implemented GSE with both real-space and k-space Poisson solvers.

Related Experiment Videos

  • Analyzed computational cost and parallelization efficiency for various system sizes.

    • Main Results:

    • Real-space GSE achieves approximately twice the speed of previous real-space methods for biomolecular simulations.
    • GSE demonstrates competitive performance with leading k-space methods for moderate system sizes.
    • GSE combined with a k-space solver offers a tunable alternative comparable to SPME.

    Conclusions:

    • GSE presents a versatile and efficient Ewald mesh method.
    • GSE bridges the performance gap between real-space and k-space methods.
    • The unified framework simplifies the description and comparison of Ewald mesh techniques.