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 "name": "[[24,6,4]] weight-6 generalized bicycle (2BGA) code",
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 "provenance": {
  "authors": [
   "Lin, Hsiang-Ku",
   "Pryadko, Leonid P."
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  "origin": "baseline",
  "construction": "Generalized bicycle (cyclic 2BGA) code over C_12: a(x) = 1 + x^3, b(x) = 1 + x + x^3 + x^7.",
  "date": "2023-06-28",
  "references": [
   "arXiv:2306.16400",
   "arXiv:2203.17216"
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  "notes": "Parameters from the Lin-Pryadko 2BGA enumeration (arXiv:2306.16400, w=6 abelian/GB tier). Explicit polynomials reconstructed by exhaustive weight-6 GB search over C_12 with the repo research kit; distance proven exact by cutoff MILP (scipy/HiGHS). Seeded so the global frontier reflects the published state of the art (issue #52). 2D-local layout added 2026-07-27: simulated annealing over qubit-to-site assignments on a unit-spaced triangular grid (2 layers, capacity 1 per site per layer); measured interaction radius 2.645751 (bilayer); same code, same check matrices."
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