On 4/18/13 7:31 AM, Andrish Reddy wrote:
Greetings,

I am simulating a box of TIP5P waters and I would like to know if it is 
possible to change the standard LJ potential function to a more complex one 
(LJ-Gauss), while keeping the coulombic interaction standard. The custom 
potential will act between the oxygen atoms only and has the form:
eps*[(sig/r)^12 - 2*(sig/r)^6] - epsG*[exp-(((r-rG)^2) / (2*sigG^2))] where 
epsG, sigG and rG are new parameters.

Can this be accomplished using tables, a custom force field / topology, or 
other?
I would appreciate any suggestions relating to how this can be done.


Tabulated potentials are the best bet.

-Justin

--
========================================

Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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