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 "provenance": {
  "authors": [
   "@MathysRennela"
  ],
  "construction": "Bivariate bicycle code QC(A,B) on Z_18 x Z_4 with weight-4 generators A = 1 + x y^2 + x^9 y^3 + x^14 y, B = x^8 y^2 + x y + x^12 + x^12 y^1 (weight-8 checks). Found by a random weight-8 gap sweep over grids not searched by arXiv:2609.06572, targeting the [[144,8,>=13]] gap of the weight-8 cell frontier.",
  "origin": "submission",
  "date": "2026-09-09",
  "model": "Omen Alpha 1.0",
  "notes": "New parameters (submitter claim): arXiv:2609.06572 swept only the (12,6) and (8,9) grids; this is from the unsearched (18,4) grid. Distance: RIS upper bound d<=15 (20k trials), corroborated by BP+OSD at 200k trials/side (weight-15 logicals, nothing lighter); exact certification not run.",
  "novelty": "new_parameters"
 },
 "family": "bivariate-bicycle"
}