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    86,
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    92,
    121,
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    266,
    278,
    286
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    93,
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    267,
    279,
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    96,
    124,
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    97,
    125,
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    283,
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   [
    99,
    127,
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   [
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    128,
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   [
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    276,
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   [
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   [
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   [
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    281,
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   [
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    135,
    142,
    282,
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    298
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   [
    110,
    136,
    143,
    283,
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   [
    111,
    137,
    144,
    284,
    294,
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   [
    116,
    139,
    145,
    220,
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   ],
   [
    117,
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    146,
    288,
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   [
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    141,
    147,
    289,
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   ],
   [
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    142,
    148,
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   ],
   [
    120,
    143,
    149,
    291,
    300,
    305
   ],
   [
    125,
    145,
    150,
    230,
    302,
    306
   ],
   [
    126,
    146,
    151,
    295,
    303,
    307
   ],
   [
    127,
    147,
    152,
    296,
    304,
    308
   ],
   [
    128,
    148,
    153,
    297,
    305,
    309
   ],
   [
    133,
    150,
    154,
    240,
    307,
    310
   ],
   [
    135,
    152,
    155,
    302,
    309,
    311
   ]
  ]
 },
 "distance": {
  "d": 22,
  "X": {
   "value": 22,
   "confidence": "upper_bound",
   "witness": [
    9,
    76,
    86,
    97,
    106,
    107,
    117,
    126,
    140,
    147,
    152,
    154,
    155,
    161,
    164,
    183,
    231,
    232,
    241,
    272,
    289,
    307
   ]
  },
  "Z": {
   "value": 22,
   "confidence": "upper_bound",
   "witness": [
    37,
    48,
    57,
    58,
    77,
    79,
    88,
    98,
    110,
    119,
    143,
    184,
    202,
    212,
    223,
    234,
    244,
    265,
    291,
    293,
    298,
    304
   ]
  }
 },
 "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+xy^3 on the abelian quotient group Z^2/L with twist basis a_1=[0, 78], a_2=[2, -16] (n=2|det[a_1,a_2]|=2*156). 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"
}
