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Gravitational smoothing as a global optimization strategy.

T W Whitfield1, John E Straub

  • 1Department of Chemistry, Boston University, Boston, Massachusetts 02215, USA.

Journal of Computational Chemistry
|July 13, 2002
PubMed
Summary
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This study introduces a novel optimization method for atomic clusters by amplifying gravitational force. The technique successfully determined stable structures for Lennard-Jones and Morse clusters of various sizes.

Area of Science:

  • Computational Chemistry
  • Materials Science
  • Physics

Background:

  • Atomic clusters are fundamental building blocks in materials science.
  • Determining the lowest energy structure of atomic clusters is computationally challenging.
  • Existing optimization methods may struggle with complex potential energy landscapes.

Purpose of the Study:

  • To introduce a new optimization scheme for finding stable atomic cluster structures.
  • To evaluate the effectiveness of the proposed method using established model potentials.
  • To explore the application of the gravitational force exaggeration technique in cluster structure prediction.

Main Methods:

  • Development of an optimization scheme that exaggerates gravitational force.
  • Application of the method to Lennard-Jones (LJ) clusters with 13, 38, and 55 atoms.

Related Experiment Videos

  • Testing the scheme on a 13-atom Morse cluster.

    • Main Results:

    • The optimization scheme successfully identified stable configurations for the tested atomic clusters.
    • Results for Lennard-Jones clusters of 13, 38, and 55 atoms were obtained.
    • The 13-atom Morse cluster structure was also determined using this method.

    Conclusions:

    • The proposed optimization scheme is effective for predicting atomic cluster structures.
    • Exaggerating gravitational force offers a viable approach for global optimization in cluster studies.
    • This method holds potential for broader applications in computational materials design.