Editing Square well lines potential

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The '''square well lines''' (SWL) potential is given by <ref>[http://dx.doi.org/10.1063/1.3264109 Szabolcs Varga and Franz J. Vesely "A new generic model potential for mesogenic systems: Square well line potential of variable range", Journal of Chemical Physics 131, 194506 (2009)]</ref> Eq. 5:

:<math>\Phi_{\mathrm{SWL}}(1,2) = \frac{\epsilon n^2}{L^2} \int_{-L/2}^{L/2}\int_{-L/2}^{L/2} \left[ H(s_2 - r(\lambda, \mu)) -H(s_1 -r(\lambda, \mu)) \right]~{\mathrm d}\mu~{\mathrm d}\lambda </math>

where <math>H()</math> is the [[Heaviside step distribution]].
==References==
<references/>
[[category: models]]
[[category: liquid crystals]]