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engines/quan_loncar_v1/package/quan_loncar_optimizer/engine/quan_loncar_series_phase50/README.md · assembled 2026-07-29 15:57 UTC.

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Phase 50: optimized-pole waveguide-basis audit

The Phase-49 geometry is held fixed while the bare-waveguide transverse Galerkin basis grows from y2-z0 to y3-z0 at the same production quadratures. The optimized y2 pole is first reconstructed and its right mode is transported into a branch-tracked y3 corrected-pole solve.

The provisional stability gate requires a converged passive pole, at most a 10% Q change, and at least 0.999 transported mode overlap. Passing this gate is necessary, but not sufficient: the local hole basis must still be enlarged from P1-z0 to P2-z0 before more optimization is justified.