Plot orientational potential.

oripotentialplot(Potential)

This function plots the orientational potential given in Potential.

Potential is an N-by-4 array that contains the information about the orientational potential, as used in Sys.Potential for slow-motion simulations using chili. The orientational potential is represented as an expansion of Wigner functions, D^L_MK(α,β,γ), with expansion coefficients λ_LMK. In each row of Potential, give the function indices L, M, and K, and the expansions coefficient λ_LMK.

Since the overall potential must be real-valued, there is a symmetry relation between coefficients with the same L, |M| and |K|: λ^L_-M,-K = (-1)^M-K (λ^L_M,K)^*. Therefore, chili limits the input coefficients to: (1) those with positive K, (2) those with K=0 and positive M, (3) the one with M=K=0 which must be real-valued. All others are supplemented internally using the symmetry relation.

Here is a very simple potential, with only one term for L=2, M=0, K=0.

Potential = [2 0 0 0.45];
oripotentialplot(Potential);

More complicated potentials can contain multiple terms, and the coefficients might be complex.

Potential = [2 0 0 0.45; 2 0 2 -0.2+0.3i; 2 2 0 0.18-0.1i];
oripotentialplot(Potential);

chili