Berk,
Tabulated bonded potentials work fine with free-energy!
Or have you tried and they did not work?
Just to clarify -- it's not just an issue of free energy. We want to
do free energy calculations using the WCA separation and soft core
potentials.
Since tabulated nonbonded interactions work based on tabulating
interactions as a function of the distance between particles, but soft
core potentials modulate the effective distance between soft core
particles and other particles, it seemed to me there was no way to
implement soft core potentials using tabulated nonbonded interactions
(since not all particles will be soft core particles, so one would
need different interaction tables for different atoms). Am I mistaken?
If so, how would you go about doing this?
If this can be done, then we can do the WCA separation with soft core,
and there's no problem. But if it can't be done, then we're out of
luck.
David
Berk.
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