| output gate | \gamma_\rho | N | distance | cited |
|---|---|---|---|---|
| \mathrm{CCZ}_{012}\cdot \mathrm{CCZ}_{013}\cdot \mathrm{CCZ}_{023}\cdot \mathrm{CCZ}_{123} | — | 10 | d = 2 | Singh et al. (2026) |
| \mathrm{T}_{0}\cdot \mathrm{T}_{1}\cdot \mathrm{T}_{2}\cdot \mathrm{T}_{3} pure T | 6.129 | 11 | d = 2 | Singh et al. (2026) |
These factories share n, k and d but prepare different magic states. No CNOT circuit with S, Z and CZ corrections turns one of these gates into another.
Nearest lengths with the same k and d: [\![279,\,4,\,2]\!] · [\![268,\,4,\,2]\!] · [\![248,\,4,\,2]\!] · [\![315,\,4,\,2]\!] · [\![316,\,4,\,2]\!] · [\![228,\,4,\,2]\!] · [\![348,\,4,\,2]\!] · [\![196,\,4,\,2]\!] · [\![188,\,4,\,2]\!] · [\![186,\,4,\,2]\!] · [\![378,\,4,\,2]\!] · [\![380,\,4,\,2]\!]