Origin Wukong (3rd gen)

Raveh Neeman

doi:10.5281/zenodo.22674814

Origin Quantum · superconducting circuits · DEPLOYED (Jan 2024) · 72 physical qubits · 62 of them made usable · access: cloud service + export sales

architecture: Transmon lattice with tunable couplers · Open on the map

Register profile — the machine's variant of its architecture

qubit type: transmon

gate mechanism: tunable coupler

connectivity: planar lattice

control: room-temperature RF; in-house Origin Sinan calibration and Origin Pilot OS

control placement: room-temp

readout: dispersive

gate evidence: no published figure

decoder mode: offline — syndromes decoded after the run

codes: css_4_1_2

flags: post-selection dominates the result, roadmap date missed

Technologies by layer — the machine's cell per layer

1 Qubit carrier	Transmon · primary ▣ Fig. 1 (8 physical qubits in 2×4 region of Wukong) ✅ transmon, 72 computational qubits (3rd gen, Jan 2024); published T1 15.22 µs, T2 2.23 µs
2 Encoding	Bare physical qubit (no encoding) · primary ◌ 🔎 Bare two-level subspace — Computational subspace of an anharmonic oscillator; leakage to \|2⟩ is the price.
3 Gate mechanism	Tunable-coupler CZ / iSWAP · primary ▤ 🔎 tunable-coupler two-qubit gates on the 72-q chip (register); no per-gate fidelity given in note
4 Connectivity / transport	Static nearest-neighbour lattice · primary ▣ Fig. 1 (processor topology, allowed 2Q gates, 2×4 region) ✅ planar nearest-neighbour lattice, degree 4 (register)
5 Control	Room-temperature electronics + per-qubit coax/flex · primary ▤ 🔎 room-temperature RF; in-house measurement-and-control, Origin Sīnán calibration/scheduling, Origin Pilot OS (Feb 2026)
6 Readout	Dispersive microwave readout (+TWPA, Purcell) · primary ◌ 🔎 dispersive readout (register)
7 Code	Error-detection codes ([[4,2,2]], d=2 surface, iceberg, spacetime) · primary ▣ Fig. 1 (d=2 surface code, transversal CNOT); Figs. 2–4 (state prep, logical CNOT/Bell, rotations) ✅ detection only: rotated_surface d=2 + [[4,1,2]] universal logical set; transversal CNOT 88.9(5)%, logical Bell 79.4–79.5%, all post-selected (Nov 2025)
8 Decoder	— none — nothing in this layer ▣ Fig. 3 (post-selection rates); Results: Logical state preparation and measurement ✅ no real-time decoder; offline decoding with post-selection (acceptance fraction not reported), Nov 2025
9 Interconnect	— none — nothing in this layer ◌ 🔎 monolithic single-chip module, no interconnect
10 Manufacturing	Superconducting-qubit lithography (Al/AlOx/Al junctions, Nb wiring, 300 mm) · primary ◌ 🔎 Superconducting-qubit lithography (Nb/Al JJ, 300 mm) — IBM Albany 300 mm / Anderon foundry; Google Santa Barbara; Rigetti ABAA trimming (97.4% frequency-targeting success); OQC 500-qubit wafer-scale…

Standard records

T1 relaxation → 15 µs · typical (the only published Origin coherence pair)

2024 · source

T2 coherence (echo/DD) → 2.2 µs · typical

2024 · source

evidence: ✅ 4 / 10