Jiuzhang 3.0

Raveh Neeman

doi:10.5281/zenodo.22674814

USTC (Pan Jianwei group) · photonics · RETIRED (superseded by Jiuzhang 4.0; demonstrated 2023) (demonstrated 2023 (PRL; arXiv 24 Apr 2023)) · qubits not published · access: lab-only

architecture: Boson sampler · Open on the map

Register profile — the machine's variant of its architecture

qubit type: squeezed light (Gaussian boson sampling); no qubit encoding

gate mechanism: Gaussian boson sampling on a fixed optical circuit

control: room-temperature optics

control placement: room-temp

readout: pseudo-photon-number-resolving 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 ('Gaussian boson sampling experiments') ✅ squeezed light for Gaussian boson sampling
2 Encoding	— none — nothing in this layer ◌ 🔎 no encoding — raw Gaussian states; a sampler has no L2
3 Gate mechanism	Programmable linear-optical interferometer (no entangling primitive) · primary ▨ 'The Jiuzhang 3.0, which had a fixed optical circuit' ✅ Gaussian boson sampling interferometer on a fixed optical circuit
4 Connectivity / transport	— none — nothing in this layer ▨ 'The Jiuzhang 3.0, which had a fixed optical circuit' ✅ no switching or routing: fixed optical circuit
5 Control	Electro-optic drive + feed-forward electronics (room temperature) · primary ◌ 🔎 room-temperature, phase-stabilised bulk optics; control stack not described in the abstract
6 Readout	Single-photon detection (SNSPD / TES) · primary ▤ Abstract ✅ pseudo-photon-number-resolving detection, up to 255 photon clicks; 1.27 µs per sample
7 Code	— none — nothing in this layer ◌ 🔎 no QEC; not applicable to a GBS sampler
8 Decoder	— none — nothing in this layer ◌ 🔎 no decoder; not applicable
9 Interconnect	— none — nothing in this layer ◌ 🔎 no interconnect; single lab apparatus
10 Manufacturing	Bulk-optics and fibre assembly (photonic samplers) · primary ◌ 🔎 bulk-optics photonic apparatus assembled in the lab

evidence: ✅ 4 / 10