[gmx-users] New force fields

[Ram'on Garc'ia Fern'andez]

On Fri, May 03, 2002 at 04:18:06PM +0200, David van der Spoel wrote:
> On Fri, 3 May 2002, Ram'on Garc'ia Fern'andez wrote:
> 
> It's two parameters in the mdp file. Set sc_alpha to e.g. 1.5
> ; Free energy control stuff =
> sc-alpha                 = 0
> sc-sigma                 = 0.3
> 
> then you blow up the box by a factor of say 1.5, minimize, and do softcore 
> MD with pressure coupling.
> 

I have just searched the source code, and sc_* are used only for free energy
calculations. Do I have to enable free energy calculations to have soft core LJ?

On the other hand, I do not understand what do sc_alpha and sc_sigma mean.

Ramon