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Paper 1
Independent Trivariate Bicycle Codes
Aygul Azatovna Galimova
- Year
- 2026
- Journal
- arXiv preprint
- DOI
- arXiv:2603.17703
- arXiv
- 2603.17703
We introduce six independent trivariate bicycle (ITB) codes, which extend the bivariate bicycle framework of Bravyi et al.\ to three cyclic dimensions. Using asymmetric polynomial pairs on three-dimensional tori, we construct four codes including a $[[140,6,14]]$ code with $kd^2/n = 8.40$. In the code-capacity setting, the $[[140,6,14]]$ code achieves a pseudothreshold of $8.0\%$ and $kd^2/n = 8.40$, exceeding the best multivariate bicycle code of Voss et al.\ ($7.9\%$, $kd^2/n = 2.67$). With circuit-level depolarizing noise, pseudothresholds reach $0.59\%$ for $[[140,6,14]]$ and $0.53\%$ for $[[84,6,10]]$. On the SI1000 superconducting noise model, the $[[140,6,14]]$ code achieves a per-round per-observable rate of $5.6 \times 10^{-5}$ at $p = 0.20\%$. We additionally present two self-dual codes with weight-8 stabilizers: $[[54,14,5]]$ ($kd^2/n = 6.48$) and $[[128,20,8]]$ ($kd^2/n = 10.0$). These results expand the design space of algebraic quantum LDPC codes and demonstrate that the third cyclic dimension yields competitive candidates for practical fault-tolerant implementations.
Open paperPaper 2
Quantum computing with defects.
Weber JR, Koehl WF, Varley JB, Janotti A, Buckley BB, Van de Walle CG, Awschalom DD.
- Year
- 2010
- Journal
- Proc Natl Acad Sci U S A
- DOI
- 10.1073/pnas.1003052107
- arXiv
- -
No abstract.
Open paper