Summary
How can a design objective involving many incident channels be evaluated efficiently?
Uses augmented partial factorization to share computation across scattering responses and derivatives.
Demonstrates multichannel beam-splitter optimization with large workload-specific savings.
Related modelling approaches
Relation labels come from the method guide and are editorial. Unlabelled links are conceptual connections or comparison methods; the paper does not necessarily implement them.
Commentary
Gains depend on matrix structure, channel count and requested outputs.
Targets the number of excitation channels; RDIT targets layer construction and trace methods target ensemble objectives.
Interpretation and connections in this note, separate from the authors’ reported findings.