Understanding Additive Pair Potential in Molecular Dynamics

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SUMMARY

The discussion focuses on the concept of additive pair potential in molecular dynamics, emphasizing that the total potential energy of a system is the sum of the potential energies of all particle pairs. This approach simplifies calculations, although it does not account for more complex interactions involving additional particles. The distinction between pair potentials and more intricate potential functions is crucial for understanding molecular dynamics simulations.

PREREQUISITES
  • Basic understanding of molecular dynamics simulations
  • Familiarity with potential energy functions
  • Knowledge of particle interactions in physics
  • Experience with computational modeling tools
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This discussion is beneficial for molecular dynamics researchers, computational chemists, and students studying physical chemistry who seek to deepen their understanding of potential energy functions and their applications in simulations.

calif2a8
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I'm sorry, I wasn't exactly sure where to put this question but this section is probably my best bet. I'm basically trying to understand potential functions of more than 1 parameter... which is basically, most potential functions out there for molecular dynamics, what I just started working with. What is an "additive pair potential"? I can't seem to piece it together :rolleyes:
 
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It means that the total potential energy of the system is the sum over all potential energies of pairs of particles in the system. It does not, in general, have to be the case. For example: if the energy between two particles depend on whether there is a third particle nearby than the potential energy is much more complicated than the pair potential. Usually we assume pair potential for simplicity.
 

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