~~NOTOC~~
====== Examples : Pair Potentials ======

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<wrap round important 560px center>
//**Warning:**//
This is an example potential. Please do NOT use it for any real simulations!
</wrap>

This is a simple pair potential that can be used in //potfit//. 
The analytic function used is a Lennard-Jones.

It makes use of the **chemical potentials** feature. <wrap caution>This feature is only available for pair interactions.</wrap>

<code potfit Example_Pair_4>
#F 0 3
#T PAIR
#I 0 0 0
#E

cp_0 -1 10 0
cp_1 -1 10 0

type lj
cutoff 6.0
epsilon 0.10    0.00    1.00
sigma   2.50    1.00    4.00

type lj
cutoff 6.0
epsilon 0.10    0.00    1.00
sigma   2.50    1.00    4.00

type lj
cutoff 6.0
epsilon 0.10    0.00    1.00
sigma   2.50    1.00    4.00
</code>

For details on the chemical potentials, see [[interactions:pair_potentials#Chemical potentials|Pair potentials]]

==== makeapot ====

The example potential can be generated with the following ''makeapot'' command:

  makeapot -n 2 -cp -i pair -f 3*lj