[gmx-users] Why the individual interaction potentials are additive?
ibrahim.khalil.chem at gmail.com
Mon Feb 6 14:30:47 CET 2017
Dear GROMACS users,
I had a somewhat of a basic (or elementary) question.
While doing MD simulations, we use interaction potentials that consist of
bonded and nonbonded potential terms- then again the bonded term consists
of some other potential terms such as bond, angle, dihedral etc.
My question is-*Why the terms are additive?*
Inside this book of R. LeSar, Introduction to Computational Materials
Science, 2013, I found- the potential energy of a system can be expanded as
a series of terms involving pair, triplets and quadriples of atoms etc. and
we ignore the rest of the higher interaction terms.
-which might explain the bonded interactions being additve.
But why the nonbonded interactions are additive to the bonded ones?
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