SXQ4
SXQ4
Register profile — the machine's variant of its architecture
qubit type: NV-centre spin in diamond
gate mechanism: microwave-frequency gates (SaxonQ: spins 'steered with microwave-frequency gates')
connectivity: single 4-qubit core
control: room temperature (18–27 °C), mobile; spins initialised and read out optically, microwave gates
control placement: room temperature
readout: optical spin readout
gate evidence: no published figure
flags: no published error rates, company claim
Technologies by layer — the machine's cell per layer
| 1 Qubit carrier | Colour-centre / defect spin (NV, SiV, SnV, T centre) · primary ▦ SXQ4 card ('Scale 4 qubits', 'Cores 1 core'); technology paragraph ✅ NV centres in diamond; SXQ4: 4 qubits, one core, delivered 2023–2025 |
| 2 Encoding | Single-spin (Loss–DiVincenzo) / nuclear-spin encoding · primary ◌ 🔎 NV spin qubits (family-determined); encoding not described |
| 3 Gate mechanism | Microwave / optical spin gates (defect centres, 1Q spins) · primary ▦ technology paragraph ('Spin states are initialised and read out optically, then steered with microwave-frequency gates') ✅ spins 'steered with microwave-frequency gates' |
| 4 Connectivity / transport | Static nearest-neighbour lattice · primary ◌ 🔎 single 4-qubit core: local register (family-determined) |
| 5 Control | — (Atlas gap: ∅G-nvroom) · primary ▦ technology paragraph; SXQ4 card ('Temp 18–27 °C') ✅ optical initialisation and microwave gates at room temperature (18–27 °C), mobile, no cryogenics |
| 6 Readout | Fluorescence state detection (ions, defects) · primary ▦ technology paragraph ✅ optical spin readout ('read out optically') |
| 7 Code | |
| 8 Decoder | |
| 9 Interconnect | |
| 10 Manufacturing | Diamond growth / implantation (NV, SiV, SnV) · primary ◌ 🔎 NV centres in diamond (family-determined); no fab detail published |
evidence: ✅ 5 / 10