Montage (first-generation QaaS system, up to 50 qubits)
Montage (first-generation QaaS system, up to 50 qubits)
Register profile — the machine's variant of its architecture
qubit type: ion species undisclosed
gate mechanism: multi-qubit optical gates within a core (company direction); mechanism undisclosed
connectivity: 2-D trapped-ion architecture, multi-core modularity; inter-core link mechanism undisclosed
control: undisclosed
control placement: undisclosed
readout: fluorescence
gate evidence: no published figure
flags: no published error rates, target
Technologies by layer — the machine's cell per layer
| 1 Qubit carrier | Trapped atomic ion · primary ▣ Fig. 1 (architecture: RF-trapped ion crystal segmented by dynamic optical potentials); Fig. 4 (N=231 ions in S=6 cells) ✅ ion species undisclosed; 1,000-qubit multi-core system 'in development' (Apr 2026) |
| 2 Encoding | |
| 3 Gate mechanism | Mølmer–Sørensen / light-shift laser gate · primary ▤ §VI Parallel multi-qubit logic and crosstalk mitigation; Fig. 7 (crosstalk mitigation vs optical trapping potential) ✅ multi-qubit optical gates within a core (company direction); gate mechanism and fidelities undisclosed |
| 4 Connectivity / transport | Ion-chain motional bus (all-to-all in chain) · primary ▣ Fig. 1 (optically segmented crystal, cells as near-independent registers); §II Proposed architecture ✅ 2-D trapped-ion architecture 'to overcome the connectivity and scaling limitations common in linear trap designs'; multi-core modularity — undisclosed — exists, nothing published ▤ §II Proposed architecture (connectivity by rapidly reconfiguring optical potentials; B_A/B_B barrier ions swap roles) ✅ inter-core link across cores, mechanism undisclosed |
| 5 Control | — undisclosed — exists, nothing published ▤ §II Proposed architecture (local and global driving fields implement U_{s,n}); Fig. 1 ✅ control stack undisclosed |
| 6 Readout | Fluorescence state detection (ions, defects) · primary ▣ Fig. 8 (mid-circuit measurement protocol schematic); §VII Mid-circuit measurements ✅ fluorescence (family-determined) |
| 7 Code | — none — nothing in this layer ▣ Fig. 3 (quantum error correction code on an optically segmented ion-crystal); §III Application demonstrations ✅ no QEC code disclosed; none |
| 8 Decoder | |
| 9 Interconnect | — undisclosed — exists, nothing published ▤ §II Proposed architecture (segmentation reconfigured by swapping confinement of barrier ions) ✅ inter-core link mechanism undisclosed |
| 10 Manufacturing | Ion-trap fabrication (surface-electrode chips; machined 3D blade traps) · primary ◌ 🔎 trap fabrication undisclosed; surface-electrode trap assumed by family |
evidence: ✅ 8 / 11