Checks if a Fokker-Planck state vector has any spatial frequencies that its spatial grid is dangerously close to misrepresenting due to insufficient point count.
rho - Fokker-Planck state vector or a bookshelf stack thereof spc_dim - spatial dimensions of the Fokker- Planck problem, [X Y Z] spn_dim - spin dimension of the Fokker- Planck problem
figures and diagnostic messages to the console
An example of the spatial frequency distribution after the first chirp pulse of the psyche.m pulse sequence appears below.
In this case, the grid point count must be increased because some frequencies are folded.
If you are running spatial dynamics, such as diffusion and and flow, with finite difference derivative operators, the spatial grid point count should be set to several times the minimum Nyquist value.
Version 2.3, authors: Ilya Kuprov