2026-08-16 · Exact reduced-basis equivalence and derivative validation
Centered-emitter even x/y/z parity qualification
accepted artifacts updated 2026-08-17 16:55 UTC
The symmetric scalar Fourier/FEM atom solve was restricted to its exact even x/y/z sector, reducing the launch basis from 1,701 to 275 unknowns while preserving response, field, and gradient to roundoff.
Basis unknowns
1,701 → 275
Unknown reduction
6.1855×
Response error
2.092e-15
Gradient error
2.050e-15
Field correlation
1.000000000000
Measured speedup
1.8148×
Decision. Use the parity launch config for the next 2.5D centered-atom campaign. The staggered-Yee full-vector solver remains full-domain pending a separately qualified half-domain discretization.
Reproducibility artifacts
Reports, raw metrics, configurations, checkpoints, and validation data retained for this attempt.