Editing Hertzian sphere model

The '''Hertzian sphere model''' is given by <ref>[http://dx.doi.org/10.1063/1.3186742 Josep C. Pàmies, Angelo Cacciuto, and Daan Frenkel "Phase diagram of Hertzian spheres", Journal of Chemical Physics '''131''' 044514 (2009)]</ref> (Eq. 1):

:<math>
\Phi_{12}\left( r \right) = 
\left\{ \begin{array}{lll}
\epsilon (1-r/\sigma)^{5/2} & ; & r < \sigma \\
0 & ; & r \geq \sigma 
\end{array} \right.
</math>

where <math> \Phi_{12}\left( r \right) </math> is the [[intermolecular pair potential]], <math>r := |\mathbf{r}_1 - \mathbf{r}_2|</math> is the distance between site 1 and site 2. <math>\sigma</math> represents a length scale and <math>\epsilon</math> an energy. In the limit <math>k_BT/\epsilon \rightarrow 0</math> this potential becomes the [[hard sphere model]]. 

==References==
<references/>
[[category: models]]