The circuit
The 37\times154 matrix. Rows are wires and columns are rotations. A 1 means the wire takes part in the rotation, and the number beside each wire is its row weight. Scroll sideways to see every column.
| wire | 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 |
|---|---|
| out 0 (59) | 1·1··········11··111··11·1··1111··1····1·1········1·1·····111·1·1··1·1·1·111·11·····1·1···111···1·1···1··111·1··1···1·1·······1·1·····111·1·1···11··111··· |
| out 1 (65) | 1·111······1111·1·1·1····11·1··111·1··1····1····1····1··111··1111··1·1··1··1·1111·111·1·1··1·1········1111···111·1·1····1····1···1·1··1··1111···11····1··· |
| out 2 (61) | ···11······11····1·1·11······1·1···1111·1111·1·1····1·1·1·······1·11·1·111··1··11·11······1·1·1·1·······1·1··1···111·1111·1·1···1·11········1·1·11··11··1· |
| out 3 (47) | 1·1··········11··1111·······1·11·1·····1·1········1·1······1111······1·1·1···11·····1·1···1111···········1·1·1·1····1·1·······1·1······1111······11·11···· |
| out 4 (65) | 1····1·····11111·11······11·1···1····1·1···111··1····1111··11····111·1·111··11···1111·11··11··········1111····1···1·1···111··1···111···11····11·11··11··1· |
| out 5 (57) | ··1·1······1·1··111··1···11·1··111·1·····1·1····1·1·····1··1·1·11··1·1··1··1··1·1·1·1···1·11··1··1····1111···111·1····1·1····11····1···1·1·11···11····1··· |
| out 6 (57) | ···1·1·····1·1····1··1·1··1·1·1·11·1·1·1·····1·1·····11·1·111·1···111···11·····1·11·1······1··1···1····111·1··11·11·1·····1·1····111··111·1···1·1····1···· |
| out 7 (59) | 1·1··········11111····11··1···11··1···11··1··1·11·11······1·1··11·11·1···1···11·····1·111·1·····1·1····1···1·1··1··11··1··1·1111······1·1··11·1·11···1···1 |
| out 8 (67) | 1·1·11······1·111·111·11··1··1·1···1··11··1·1··11·1111····1·1····1·1··1··1··111·11·1··111··111··1·1····1··1··1···1·11··1·1··111111····1·1····1··1····1··1· |
| out 9 (69) | ··1··1·····11··1111····1·11·1···1····1111··111··1··1··1·1··11···11·1·1·111··1·1··111···11·11······1·1·1111····1···1111··111··1·1··11···11···11··11··11··1· |
| out 10 (31) | 1·1··········11···1·111···············1·1··········1·1····11·1···············11·····1·1····1·11·1··················1·1·········1·1··1·11·1················ |
| out 11 (65) | ···1·1·····1·1··111····1·11·1···1····111·1·111··1·1·····1··11···1·11·1·111··1··1·11·1···1·11······11··1111····1···111·1·111··11····1···11···1·1·11··11··1· |
| out 12 (65) | ····11······11··1·11···1·11·11·1··11···11·1·1··11·1·1·1·····11·1·1·····1·1·11···11·11···1··11·····1···11·11·11··11··11·1·1··111·1·1·····11·1·1······111·1· |
| out 13 (27) | ··1111·········1···11···················1111··········1···1···················1111·····1····11·······················1111·········1··11··················· |
| out 14 (47) | 1·1·1·1························1·1·1·1·1·1·1·1·············11111111····1·1·1111·1····························1·1·11·1·1·1·1············11111111·····111·1· |
| out 15 (65) | ··········1111·1111·11·1·11·1···1····111····11········1·1·1·1···1111·1·111··1·····111··11·11·11···1···1111····1···111····11·······11··1·1···111·11··11··1· |
| out 16 (69) | ········1··11·111··1111··11··11·111··1··11··111·1·1·1·1·1··1··1··111·······11·····11··111···111·1·····11··11··111·1··11··111·11·1·11···1··1··11·1·····1·1· |
| out 17 (69) | 11·1·1·····11··1111··11··11·1··111·1··111·1·····1··1··1·1··1··111··1·1··1··1·1·1·111···11·11··1·1·····1111···111·1·111·1·····1·1··11···1··111···11····1··· |
| out 18 (81) | ··1111·········1111·11·1·11·1···1····111111111··1111··1·1·1·1···1111·1·111··1·1111·····11·11·11···1···1111····1···111111111··111··11··1·1···111·11··11··1· |
| out 19 (67) | 1··111·······11··111··11·1··111111·1···11·11······1·1·····111·1·1··1·1·1·····1·111··1·1···111···1·1···1··111·111·1··11·11·····1·1·····111·1·1···11··1··1·· |
| out 20 (63) | ··1111·········111··1····111··1·1111··1·1·1·1··11·1··1·····1··1·11·····1·1·11·1111·····11·1··1········11···1··1111·1·1·1·1··111··1·····1··1·11······111·1· |
| out 21 (27) | ····11······11·1·····1····················11······11··1····11···················11·11··1······11·······················11·····11··1····11················· |
| out 22 (73) | ··1111···1·1·111111·11·1·11·1··111·1···········11·1··11·1·11·111···1·1··1··1··11111·1·111·11·11···1···1111···111·1··········111··111··11·111····11····1··· |
| out 23 (65) | ···1·1·····1·1·1111·11·1··1·1·11·111····1·1·····1·1···1·1·11·111·····1··11·····1·11·1··11·11·11···1····111·1·1·111···1·1·····11···11··11·111·····1·1·1···· |
| out 24 (63) | 1·1··········111·····11········1·1·1·1·1·11111·····1·11·1···1·11111····1·1·1111·····1·11·1····1·1············1·1·11·1·11111····1·111····1·11111·····111·1· |
| out 25 (69) | ··1··1·····1·111111··11··11·1··111·1·····11·····1·1·111·1··1··111··1·1··1··1··1··11·11111·11··1·1·····1111···111·1····11·····11·1111···1··111···11····1··· |
| out 26 (61) | 1······1···11··1111··11··11·1···1····1·1····1···1··1··1·1···11···111·1·111··11····11···11·11··1·1·····1111····1···1·1····1···1·1··11····11···11·11··11··1· |
| out 27 (57) | 1···1······1··111··1·1·1111··11···11···1···1····1···1·1·1·1·1··1···1···11····1··1·1···111···1·1···1··1111·11····11··1···1····1··1·11··1·1··1···11···1····· |
| check 28 (66) | ··1111·········1111·11·1·11·1···1····1········11····111·1·1·1···1111·1·111··1·1111·····11·11·11···1···1111····1···1········11···1111··1·1···111·11··11··1· |
| check 29 (66) | 1·1··········11·····1·111·1·1111··1····1·11111·····1·1····111·11·111·1··1··1·11·····1·1······1··1·1··1·11111·1··1···1·11111····1·1····111·11·11·11····1··· |
| check 30 (72) | ··111·1··11················1··11·1··11·1·1··11····1··111·11·11·1··111····111111·11·1··111·1··11··111··11····11···1111···1·1·11·········11111111··1·11111·· |
| check 31 (70) | 111····111·1111··········1··1··1111···111····111·111·1·············1··1·1111·111·1·1···1·1·1·1·1·11·1···1··1··1·1111·11·1··1··1···111·1·1·1·1·1····1·111·1 |
| check 32 (78) | ···11·111·11··1·1···11·1·11····11·1111111··1··1·11···1·1··1·1111·1111··1··1···1·1····1···1··1·1·11111·1·1·11·1·111·11·1·1111····1··1·1··1··1····1·1111··11 |
| check 33 (80) | ···1·111···11··111·11·1···11111111··11··1··1····1·1·111·11····11·11··1111······11·1·11111··1····1·111··11···111111···1·1·11··1·1··11111···1·1·····111·1111 |
| check 34 (74) | ····11··111111··1·11···1·11·11·1····111··1·1·11··11·1·1····1··1·1·1·····1·111···11···11·1··11·1111·11·11·11···1111·1··1·1·1·11·1·11·····11·1·1······11·1·1 |
| check 35 (68) | ··11········11·1·1111··1·11·11···11··11·1·1··1·11·1·1··1·111··1·1·1···········11···11···11····1111·11·11·11·1··11·11·1·1··1·111·1·1111··11·1·1············ |
| check 36 (74) | 1····1··1····1·11·111·11···1·1··11·11·111···1·111···1·····1·1····1·1111·1·1··1···1··1··11··111··1·1··11111·111··1·1111···1·111··1·····1·1····1·1··11111111 |
The gate is read off the output rows. An output row of odd weight gives a T, a pair of output rows with odd overlap gives a CS, and an odd triple overlap gives a CCZ. The circuit is a valid factory because every such parity that touches a check row is even.
Figures of merit
Output gate
As gates: \mathrm{T}_{0}\cdot \mathrm{T}_{1}\cdot \mathrm{T}_{2}\cdot \mathrm{T}_{3}\cdot \mathrm{T}_{4}\cdot \mathrm{T}_{5}\cdot \mathrm{T}_{6}\cdot \mathrm{T}_{7}\cdot \mathrm{T}_{8}\cdot \mathrm{T}_{9}\cdot \mathrm{T}_{10}\cdot \mathrm{T}_{11}\cdot \mathrm{T}_{12}\cdot \mathrm{T}_{13}\cdot \mathrm{T}_{14}\cdot \mathrm{T}_{15}\cdot \mathrm{T}_{16}\cdot \mathrm{T}_{17}\cdot \mathrm{T}_{18}\cdot \mathrm{T}_{19}\cdot \mathrm{T}_{20}\cdot \mathrm{T}_{21}\cdot \mathrm{T}_{22}\cdot \mathrm{T}_{23}\cdot \mathrm{T}_{24}\cdot \mathrm{T}_{25}\cdot \mathrm{T}_{26}\cdot \mathrm{T}_{27}
As monomials: 0+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27 (output wires per term, separated by +)
This row stands for every gate that a CNOT circuit and S, Z and CZ gates on the outputs can reach from this one. They all prepare the same magic state. The wires are shown in the S_k-canonical frame.
Clifford correction
With every rotation a \mathrm{T}=\mathrm{diag}(1,e^{i\pi/4}), the rotations deposit the gate above times a diagonal Clifford. Undo it after the rotations and before the checks are measured, with 24 single-wire gates and 181 \mathrm{CZ} gates: \mathrm{S}^\dagger on output 0, \mathrm{Z} on output 2, \mathrm{S} on output 3, \mathrm{S}^\dagger on output 7, \mathrm{S}^\dagger on output 8, \mathrm{Z} on output 9, \mathrm{S} on output 10, \mathrm{S}^\dagger on output 13, \mathrm{S} on output 14, \mathrm{Z} on output 16, \mathrm{Z} on output 17, \mathrm{S}^\dagger on output 19, \mathrm{S} on output 20, \mathrm{S}^\dagger on output 21, \mathrm{S} on output 24, \mathrm{Z} on output 25, \mathrm{Z} on output 26, \mathrm{S}^\dagger on check 28, \mathrm{S}^\dagger on check 29, \mathrm{S} on check 31, \mathrm{S} on check 32, \mathrm{S}^\dagger on check 34, \mathrm{Z} on check 35, \mathrm{S}^\dagger on check 36 and 181 more (listed below). The circuit's action is then exactly the gate above, and an error-free run passes every check with certainty.
All 205 correction gates
\mathrm{S}^\dagger on output 0, \mathrm{Z} on output 2, \mathrm{S} on output 3, \mathrm{S}^\dagger on output 7, \mathrm{S}^\dagger on output 8, \mathrm{Z} on output 9, \mathrm{S} on output 10, \mathrm{S}^\dagger on output 13, \mathrm{S} on output 14, \mathrm{Z} on output 16, \mathrm{Z} on output 17, \mathrm{S}^\dagger on output 19, \mathrm{S} on output 20, \mathrm{S}^\dagger on output 21, \mathrm{S} on output 24, \mathrm{Z} on output 25, \mathrm{Z} on output 26, \mathrm{S}^\dagger on check 28, \mathrm{S}^\dagger on check 29, \mathrm{S} on check 31, \mathrm{S} on check 32, \mathrm{S}^\dagger on check 34, \mathrm{Z} on check 35, \mathrm{S}^\dagger on check 36, \mathrm{CZ} on output 0, check 35, \mathrm{CZ} on output 1, output 2, \mathrm{CZ} on output 1, output 4, \mathrm{CZ} on output 1, output 5, \mathrm{CZ} on output 1, output 6, \mathrm{CZ} on output 1, output 9, \mathrm{CZ} on output 1, output 11, \mathrm{CZ} on output 1, output 15, \mathrm{CZ} on output 1, output 17, \mathrm{CZ} on output 1, output 18, \mathrm{CZ} on output 1, output 22, \mathrm{CZ} on output 1, output 23, \mathrm{CZ} on output 1, output 25, \mathrm{CZ} on output 1, output 26, \mathrm{CZ} on output 1, output 27, \mathrm{CZ} on output 1, check 28, \mathrm{CZ} on output 1, check 29, \mathrm{CZ} on output 1, check 33, \mathrm{CZ} on output 1, check 35, \mathrm{CZ} on output 2, output 4, \mathrm{CZ} on output 2, output 5, \mathrm{CZ} on output 2, output 6, \mathrm{CZ} on output 2, output 9, \mathrm{CZ} on output 2, output 11, \mathrm{CZ} on output 2, output 15, \mathrm{CZ} on output 2, output 17, \mathrm{CZ} on output 2, output 18, \mathrm{CZ} on output 2, output 22, \mathrm{CZ} on output 2, output 23, \mathrm{CZ} on output 2, output 25, \mathrm{CZ} on output 2, output 26, \mathrm{CZ} on output 2, output 27, \mathrm{CZ} on output 2, check 28, \mathrm{CZ} on output 2, check 29, \mathrm{CZ} on output 2, check 33, \mathrm{CZ} on output 4, output 5, \mathrm{CZ} on output 4, output 6, \mathrm{CZ} on output 4, output 9, \mathrm{CZ} on output 4, output 11, \mathrm{CZ} on output 4, output 15, \mathrm{CZ} on output 4, output 17, \mathrm{CZ} on output 4, output 18, \mathrm{CZ} on output 4, output 22, \mathrm{CZ} on output 4, output 23, \mathrm{CZ} on output 4, output 25, \mathrm{CZ} on output 4, output 26, \mathrm{CZ} on output 4, output 27, \mathrm{CZ} on output 4, check 28, \mathrm{CZ} on output 4, check 29, \mathrm{CZ} on output 4, check 33, \mathrm{CZ} on output 4, check 35, \mathrm{CZ} on output 5, output 6, \mathrm{CZ} on output 5, output 9, \mathrm{CZ} on output 5, output 11, \mathrm{CZ} on output 5, output 15, \mathrm{CZ} on output 5, output 17, \mathrm{CZ} on output 5, output 18, \mathrm{CZ} on output 5, output 22, \mathrm{CZ} on output 5, output 23, \mathrm{CZ} on output 5, output 25, \mathrm{CZ} on output 5, output 26, \mathrm{CZ} on output 5, output 27, \mathrm{CZ} on output 5, check 28, \mathrm{CZ} on output 5, check 29, \mathrm{CZ} on output 5, check 33, \mathrm{CZ} on output 5, check 35, \mathrm{CZ} on output 6, output 9, \mathrm{CZ} on output 6, output 11, \mathrm{CZ} on output 6, output 15, \mathrm{CZ} on output 6, output 17, \mathrm{CZ} on output 6, output 18, \mathrm{CZ} on output 6, output 22, \mathrm{CZ} on output 6, output 23, \mathrm{CZ} on output 6, output 25, \mathrm{CZ} on output 6, output 26, \mathrm{CZ} on output 6, output 27, \mathrm{CZ} on output 6, check 28, \mathrm{CZ} on output 6, check 29, \mathrm{CZ} on output 6, check 33, \mathrm{CZ} on output 6, check 35, \mathrm{CZ} on output 7, check 35, \mathrm{CZ} on output 8, check 35, \mathrm{CZ} on output 9, output 11, \mathrm{CZ} on output 9, output 15, \mathrm{CZ} on output 9, output 17, \mathrm{CZ} on output 9, output 18, \mathrm{CZ} on output 9, output 22, \mathrm{CZ} on output 9, output 23, \mathrm{CZ} on output 9, output 25, \mathrm{CZ} on output 9, output 26, \mathrm{CZ} on output 9, output 27, \mathrm{CZ} on output 9, check 28, \mathrm{CZ} on output 9, check 29, \mathrm{CZ} on output 9, check 33, \mathrm{CZ} on output 11, output 15, \mathrm{CZ} on output 11, output 17, \mathrm{CZ} on output 11, output 18, \mathrm{CZ} on output 11, output 22, \mathrm{CZ} on output 11, output 23, \mathrm{CZ} on output 11, output 25, \mathrm{CZ} on output 11, output 26, \mathrm{CZ} on output 11, output 27, \mathrm{CZ} on output 11, check 28, \mathrm{CZ} on output 11, check 29, \mathrm{CZ} on output 11, check 33, \mathrm{CZ} on output 11, check 35, \mathrm{CZ} on output 12, check 33, \mathrm{CZ} on output 12, check 34, \mathrm{CZ} on output 13, check 35, \mathrm{CZ} on output 15, output 17, \mathrm{CZ} on output 15, output 18, \mathrm{CZ} on output 15, output 22, \mathrm{CZ} on output 15, output 23, \mathrm{CZ} on output 15, output 25, \mathrm{CZ} on output 15, output 26, \mathrm{CZ} on output 15, output 27, \mathrm{CZ} on output 15, check 28, \mathrm{CZ} on output 15, check 29, \mathrm{CZ} on output 15, check 33, \mathrm{CZ} on output 15, check 35, \mathrm{CZ} on output 16, check 31, \mathrm{CZ} on output 16, check 32, \mathrm{CZ} on output 16, check 36, \mathrm{CZ} on output 17, output 18, \mathrm{CZ} on output 17, output 22, \mathrm{CZ} on output 17, output 23, \mathrm{CZ} on output 17, output 25, \mathrm{CZ} on output 17, output 26, \mathrm{CZ} on output 17, output 27, \mathrm{CZ} on output 17, check 28, \mathrm{CZ} on output 17, check 29, \mathrm{CZ} on output 17, check 33, \mathrm{CZ} on output 18, output 22, \mathrm{CZ} on output 18, output 23, \mathrm{CZ} on output 18, output 25, \mathrm{CZ} on output 18, output 26, \mathrm{CZ} on output 18, output 27, \mathrm{CZ} on output 18, check 28, \mathrm{CZ} on output 18, check 29, \mathrm{CZ} on output 18, check 33, \mathrm{CZ} on output 18, check 35, \mathrm{CZ} on output 19, check 35, \mathrm{CZ} on output 21, check 35, \mathrm{CZ} on output 22, output 23, \mathrm{CZ} on output 22, output 25, \mathrm{CZ} on output 22, output 26, \mathrm{CZ} on output 22, output 27, \mathrm{CZ} on output 22, check 28, \mathrm{CZ} on output 22, check 29, \mathrm{CZ} on output 22, check 33, \mathrm{CZ} on output 22, check 35, \mathrm{CZ} on output 23, output 25, \mathrm{CZ} on output 23, output 26, \mathrm{CZ} on output 23, output 27, \mathrm{CZ} on output 23, check 28, \mathrm{CZ} on output 23, check 29, \mathrm{CZ} on output 23, check 33, \mathrm{CZ} on output 23, check 35, \mathrm{CZ} on output 25, output 26, \mathrm{CZ} on output 25, output 27, \mathrm{CZ} on output 25, check 28, \mathrm{CZ} on output 25, check 29, \mathrm{CZ} on output 25, check 33, \mathrm{CZ} on output 26, output 27, \mathrm{CZ} on output 26, check 28, \mathrm{CZ} on output 26, check 29, \mathrm{CZ} on output 26, check 33, \mathrm{CZ} on output 27, check 28, \mathrm{CZ} on output 27, check 29, \mathrm{CZ} on output 27, check 33, \mathrm{CZ} on output 27, check 35, \mathrm{CZ} on check 28, check 29, \mathrm{CZ} on check 28, check 33, \mathrm{CZ} on check 28, check 35, \mathrm{CZ} on check 29, check 33, \mathrm{CZ} on check 29, check 35, \mathrm{CZ} on check 31, check 32, \mathrm{CZ} on check 31, check 36, \mathrm{CZ} on check 32, check 36, \mathrm{CZ} on check 33, check 34, \mathrm{CZ} on check 35, check 36
Or no Clifford gate at all: run \mathrm{T}^3 on rotations 8, 19, 23, 24, 25, 26, 35, 40, 42, 43, 44, 48, 50, 51, 52, 54, 56, 57, 58, 59, 62, 65, 66, 67 and 44 more (listed below); \mathrm{T}^5 on rotations 3, 5, 15, 18, 22, 39; \mathrm{T}^\dagger on rotations 0, 1, 2, 6, 9, 10, 20, 27, 32, 79, 80, and \mathrm{T} on the rest. A power of \mathrm{T} costs one magic state, like \mathrm{T} itself. For a code this is a transversal \mathrm{T} gate, \mathrm{T}^j on each qubit.
All 68 rotations at T³
8, 19, 23, 24, 25, 26, 35, 40, 42, 43, 44, 48, 50, 51, 52, 54, 56, 57, 58, 59, 62, 65, 66, 67, 69, 74, 76, 78, 82, 83, 85, 86, 87, 88, 89, 91, 93, 96, 97, 100, 101, 105, 106, 109, 115, 117, 118, 120, 121, 122, 123, 125, 127, 128, 129, 131, 134, 135, 136, 137, 138, 140, 142, 143, 145, 147, 149, 153
Rotations are numbered by matrix column, from 0. The correction comes from the columns by the weight expansion of Bravyi and Haah (2012). verify_catalog.py re-derives it, checks the corrected circuit's phase input by input against the gate, and on small circuits simulates it gate by gate.
Convert the output with CNOT and S
A CNOT circuit on the outputs, followed by S, Z and CZ gates, turns this factory's gate into other gates that prepare the same magic state. Type a target gate to check whether it is reachable. If it is, you get the circuit, checked on every basis state.
Or list every gate it reaches. The list is built in your browser and saved as a text file, one gate per line.
Python code that writes the same list
import json, urllib.request
NAMES = {1: "T", 2: "CS", 3: "CCZ"}
def equivalent_gates(k, terms, limit=1_000_000):
"""Every gate a CNOT circuit and S, Z, CZ gates reach from this one.
A gate is its set of terms mod Clifford: {a} is T, {a,b} is CS and
{a,b,c} is CCZ on those outputs. CNOT c->t sends x_t to
x_c + x_t - 2 x_c x_t, so a term on t but not c adds the term with t
replaced by c, and, below CCZ, the term with c added.
"""
start = frozenset(frozenset(m) for m in terms)
seen, queue = {start}, [start]
for gate in queue:
for c in range(k):
for t in range(k):
if c == t:
continue
new = set(gate)
for m in gate:
if t in m and c not in m:
new ^= {(m - {t}) | {c}}
if len(m) < 3:
new ^= {m | {c}}
new = frozenset(new)
if new not in seen:
seen.add(new)
queue.append(new)
if len(seen) > limit:
raise RuntimeError(f"more than {limit} equivalent gates")
return seen
def name(gate, k):
sep = "," if k > 10 else ""
terms = sorted((sorted(m) for m in gate), key=lambda m: (len(m), m))
return "·".join(NAMES[len(m)] + sep.join(map(str, m)) for m in terms) or "I"
url = "https://shubhamj810.github.io/magic-state-factory-repo/data/factories/154.28.3.a.json"
record = json.load(urllib.request.urlopen(url))
k = record["parameters"]["k"]
gates = equivalent_gates(k, record["gate"]["monomials"])
lines = sorted(name(g, k) for g in gates)
print(len(lines), "equivalent gates")
with open("equivalent-gates-154.28.3.a.txt", "w") as out:
out.write("\n".join(lines) + "\n")
Distance
d=3, exact. No fault of weight below 3 is both undetectable and damaging. One of weight 3 is.
Exactly 1,142 faults of weight 3 are undetectable and damaging, so A_{3}=1{,}142. If each rotation fails independently with probability p, an accepted run has a damaged output with probability A_{3}\,p^{3}+O(p^{4}).
A damaging fault of weight 3 sits on columns [0,1,101].
A fault is a set of faulty columns. It is undetectable when their check parts cancel, and damaging when their output parts do not.
Original source
S. P. Jain, A. Wills, and S. Singh, "Symmetry and AI-assisted discovery of magic-state factories," arXiv:2610.06535 (2026). arxiv.org/abs/2610.06535
Provenance
a paired-column contraction of an existing triorthogonal code, in the pure-T distillation-exponent release (gamma = log(n/k)/log d, n < 1000); a verified witness, not a maximum -- only the release's own frontier points are the lowest gamma it knows
Found by: AI search (gamma frontier): contraction of an existing code
Discovery: AI search
1 recorded source
[
{
"regime": "AI search (gamma frontier): contraction of an existing code",
"file": "gamma_frontier_release/protocols/paired_column_contraction_156_28_3_6b999f3a09d8.json",
"label": "paired_column_contraction_156_28_3_6b999f3a09d8",
"N": 37,
"d": 3,
"d_is_exact": true,
"origin": "Existing triorthogonal code with physical paired-column contraction",
"provenance": "gamma frontier release record paired_column_contraction_156_28_3_6b999f3a09d8 (source catalogue id paired_column_contraction_156_28_3_6b999f3a09d8); construction: Existing triorthogonal code with physical paired-column contraction; matrix 6b999f3a09d8922f...; the release states d=3 (exact), gamma=1.5634737703113704 (exact); the release matrix has 156 columns of which 2 are a repeated pair -- equal columns cancel to a diagonal Clifford and deposit nothing, so they are deleted here and this circuit is the reduced one, with 154 injections for the same gate and distance",
"notes": "matrix gamma_frontier_release/matrices/6b999f3a09d8922f0215076f84e45a2214dee5b7945b54669c5dc81151e4e81a.matrix"
}
]Use it in code
Load this factory and re-derive every number from its circuit with the catalogue's own verifier.
# git clone https://github.com/shubhamj810/magic-state-factory-repo
# cd magic-state-factory-repo/master_catalog
import json, urllib.request
import verify_catalog as VC
url = "https://shubhamj810.github.io/magic-state-factory-repo/data/factories/154.28.3.a.json"
record = json.load(urllib.request.urlopen(url))
columns = record["circuit"]["columns"]
k, N = record["parameters"]["k"], record["parameters"]["N"]
facts, problems = VC.derive(columns, k, N) # gate, T-count, degree, ...
distance = VC.measure_distance(columns, k, N) # exhaustive fault search
print(facts["gate_human"], distance["d_exact"] or distance["d_at_least"],
problems or "verified")
Raw record
Show the JSON this page is built from
Source: master_catalog.json, factories[771].