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	<p>This force simulates the <a href="http://en.wikipedia.org/wiki/Lennard-Jones_potential">Lennard-Jones potential</a>. There are three parameters for this force:</p>
	<ul>
        <li><b>depth:</b> The minimum value of the Lennard-Jones potential wall</li>
        <li><b>rmin:</b> The distance from the origin to the minimum of the potential</li>
        <li><b>cutoff:</b> The distance, where the Lennard-Jones (LJ) potential is often truncated to save computational time</li>
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	<p>These parameters are empirical and are usually obtained from experiment or some rough estimation.</p>
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