The height of barriers to backward steps is positively correlated with the backward step size.

<p>For 100 randomly generated potentials , we plotted the size of each of the 26 steps versus the height of the corresponding barrier to backward steps (<i>i.e.</i> the energy difference between the minimum of and its immediately preceding maximum). Each color corresponds to a particular potential. We used: , with , and drawn uniformly at random with fixed total power . The torque is .</p>