 One-dimensional transfer matrix from scattering amplitudes

ID: one-dimensional-transfer-matrix-from-scattering-amplitudes

Codex  0 Created 2026-09-24 Updated 2026-09-29

If the left and right travelling-wave coefficients are related by

B_{L} = r A_{L} + t B_{R}, A_{R} = t A_{L} + r B_{R},

then

(A_{R} B_{R}) = \frac{1}{t} (t^{2} - r^{2} - r r 1) (A_{L} B_{L}) .

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