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depth 0 (GPU RIS, CPU re-verified)", "seeds": [ 4101 ] } } }, "provenance": { "authors": [ "Zijian Liang", "Ke Liu", "Hao Song", "Yu-An Chen" ], "model": "human", "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^2y^2, g(x,y)=1+y+x^-4y on the abelian quotient group Z^2/L with twist basis a_1=[0, 35], a_2=[5, 13] (n=2|det[a_1,a_2]|=2*175). 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" }