qpms/BUGS.rst

Known bugs

Wrong factor on B coefficient

Under Kristensson normalisation (with CS = -1), my code gives B(1,0,n,n)/B(1,0,n,-n) == -(2n)! at (x,y,z) = (x,0,0) (expected plus or minus 1). A-coefficients seem to behave correctly.

Scattering result asymmetry

The lattice scattering code (such as finitesqlatzsym-scattery.py) produces asymmetric results where one should not get them, due to the system symmetry.

It seems that the asymmetry appears mostly in the y-direction (i.e. for example the scattering/absorption cross section at k = (kx, ky, kz) is not exactly the same as k = (kx, -ky, kz).

What has been checked (hopefully):

• The flip operators for electric waves
• Some weird kind of rounding or other numerical error depending on the position ordering of the matrix (randomized indices give the same asymmetry).

What has not been checked (so well):

• The x,y,z-flip operators for magnetic waves (i.e. are they really supposet to bejust the same as the operators for electric waves, just with opposite sign?)
• zplane_pq_y
• the translation operators

Singular value asymmetry

Similar as the scattering result asymmetry, although not necessarily only in the y-direction?

Overflows etc.

Assertion failed in gaunt_xu for test_vswf_translations.c and high values of LMAX (LMAX=25)