Seam modular commutator
v489_seam_modular_commutator.py · core
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SEAM.CCC.01: the chiral central charge c_- = 8 measured DIRECTLY from the bulk ground state of the v367 seam lattice model, via the Kim-Shehab-Kim modular commutator J(A,B,C) = i Tr(rho_ABC [K_AB, K_BC]) = (pi/3) c_- on a 120-degree pie tripartition -- the first ground-state witness for premise (i) of SEAM.EQUIV.01 (c_- = 8) INDEPENDENT of both the Chern route (v367) and the KLM counting route (v378); everything reduces to the Peschel Majorana covariance (W = -2 artanh Gamma). [E] purity: eig(i Gamma) = +-1 to 6e-15 (exact BdG ground state). [E] per-layer c_- = 0.499998 (L=32, R=12; 0.499793 at L=16 -> 0.500000 at L=48, dev -1.8e-7). [E] controls: trivial M=3 -> 0.000000, orientation flip M=-1 -> -0.499986. [E] layer additivity exact (1.4e-14). [E] 16-layer carrier: direct c_- = 7.9967 (L=16; L=24 gives 7.999781), additivity route 8.0000 = g_car + N_fam. [E] clip invariance 5e-8. [O] honest fence: pins c_- = 8 on the lattice ground state; does NOT close SEAM.EQUIV.01 (continuum limit MMST v336 stays [O], mu4 condensation stays the cited KLM step v378). Numerical (numpy), Python-only by nature.
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