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   ],
   [
    86,
    93,
    102,
    199,
    211,
    219
   ],
   [
    10,
    94,
    103,
    200,
    212,
    220
   ],
   [
    96,
    104,
    116,
    131,
    214,
    221
   ],
   [
    54,
    97,
    105,
    204,
    215,
    222
   ],
   [
    93,
    99,
    106,
    161,
    217,
    223
   ],
   [
    94,
    100,
    107,
    207,
    218,
    224
   ],
   [
    95,
    101,
    108,
    208,
    219,
    225
   ],
   [
    15,
    102,
    109,
    209,
    220,
    226
   ],
   [
    63,
    104,
    110,
    137,
    222,
    227
   ],
   [
    102,
    106,
    111,
    170,
    224,
    228
   ],
   [
    103,
    107,
    112,
    216,
    225,
    229
   ],
   [
    21,
    108,
    113,
    217,
    226,
    230
   ],
   [
    109,
    111,
    114,
    179,
    229,
    231
   ],
   [
    28,
    112,
    115,
    223,
    230,
    232
   ],
   [
    36,
    114,
    116,
    188,
    232,
    233
   ]
  ]
 },
 "distance": {
  "d": 18,
  "X": {
   "value": 18,
   "confidence": "upper_bound",
   "witness": [
    13,
    20,
    32,
    35,
    41,
    48,
    72,
    78,
    98,
    130,
    131,
    182,
    191,
    195,
    203,
    204,
    214,
    215
   ]
  },
  "Z": {
   "value": 18,
   "confidence": "upper_bound",
   "witness": [
    26,
    33,
    43,
    51,
    52,
    60,
    70,
    78,
    79,
    87,
    117,
    119,
    126,
    131,
    135,
    141,
    142,
    149
   ]
  }
 },
 "provenance": {
  "authors": [
   "Zijian Liang",
   "Ke Liu",
   "Hao Song",
   "Yu-An Chen"
  ],
  "construction": "Twisted-torus bivariate-bicycle code from Generalized toric codes on twisted tori for quantum error correction (PRX Quantum 6, 020357, 2025). Stabilizers f(x,y)=1+x+x^-1y^3, g(x,y)=1+y+x^3y^-1 on the abelian quotient group Z^2/L with twist basis a_1=[0, 39], a_2=[3, 6] (n=2|det[a_1,a_2]|=2*117). Reconstructed from the published polynomials and twist; CSS form H_X=[f|g], H_Z=[gbar|fbar].",
  "references": [
   "arXiv:2503.03827"
  ],
  "date": "2025",
  "notes": "Reconstructed baseline from Liang, Liu, Song, Chen, Generalized toric codes on twisted tori for quantum error correction (PRX Quantum 6, 020357, 2025), arXiv:2503.03827. The [[n,k,d]] parameter set and stabilizer polynomials are published in that paper; this entry reproduces them. Distance is an upper bound per the paper (probabilistic for d>20); the witness is the surrogate logical of that weight. Seeded to fill a board coverage gap at this block size, not a discovery.",
  "origin": "baseline",
  "novelty": "known_parameters"
 },
 "family": "bivariate-bicycle"
}