Jiuzhang (1.0)
Jiuzhang (1.0)
Register profile — the machine's variant of its architecture
qubit type: squeezed light (Gaussian boson sampling); no qubit encoding
gate mechanism: fixed (non-programmable) 100-mode ultralow-loss interferometer with full connectivity and a random transformation
connectivity: full connectivity across 100 modes inside the fixed interferometer
control: room-temperature optics
control placement: room-temp
readout: 100 high-efficiency single-photon detectors (click detection)
gate evidence: no published figure
flags: estimated baseline
Technologies by layer — the machine's cell per layer
| 1 Qubit carrier | Squeezed light mode (CV) · primary ▤ Abstract ('50 input single-mode squeezed states') ✅ 50 single-mode squeezed states (Gaussian boson sampling); no qubits |
| 2 Encoding | |
| 3 Gate mechanism | Programmable linear-optical interferometer (no entangling primitive) · primary ▤ Abstract ('100-mode ultralow-loss interferometer') ✅ 100-mode ultralow-loss interferometer with full connectivity and a random transformation; fixed, not programmable |
| 4 Connectivity / transport | — none — nothing in this layer ▨ 'the original Jiuzhang, which had a fixed optical circuit' ✅ no switching or routing: a fixed optical circuit couples all 100 modes (recorded under L3) |
| 5 Control | Electro-optic drive + feed-forward electronics (room temperature) · primary ◌ 🔎 room-temperature, phase-stabilised bulk optics (as Jiuzhang 4.0); control stack not described in the abstract |
| 6 Readout | Single-photon detection (SNSPD / TES) · primary ▤ Abstract ✅ 100 high-efficiency single-photon detectors; up to 76 output photon clicks |
| 7 Code | |
| 8 Decoder | |
| 9 Interconnect | |
| 10 Manufacturing | Bulk-optics and fibre assembly (photonic samplers) · primary ◌ 🔎 bulk-optics photonic apparatus assembled in the lab |
evidence: ✅ 4 / 10