Difference between revisions of "Overwound.m"
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==See also== | ==See also== | ||
[[imaging.m]], [[hydrodynamics.m]], [[g2fplanck.m]], [[phan2fpl.m]], [[fpl2phan.m]] | [[imaging.m]], [[hydrodynamics.m]], [[g2fplanck.m]], [[phan2fpl.m]], [[fpl2phan.m]] | ||
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''Version 2.3, authors: [[Ilya Kuprov]]'' | ''Version 2.3, authors: [[Ilya Kuprov]]'' | ||
Revision as of 12:28, 25 April 2026
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.
Syntax
overwound(rho,spc_dim,spn_dim)
Arguments
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
Outputs
figures and diagnostic messages to the console
Examples
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.
Notes
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.
See also
imaging.m, hydrodynamics.m, g2fplanck.m, phan2fpl.m, fpl2phan.m
Version 2.3, authors: Ilya Kuprov
