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Shenglian (BAQIS)

Beijing Academy of Quantum Information Sciences

Shenglian (BAQIS)

Beijing Academy of Quantum Information Sciences · superconducting circuits · DEMONSTRATED (Jul 2026) · 84 physical qubits · access: not stated (the paper cites the BAQIS Quafu platform)
architecture: Transmon lattice with tunable couplers · Open on the map

Register profile — the machine's variant of its architecture

qubit type: tunable transmon
gate mechanism: tunable coupler (non-adiabatic CZ, 48 ns)
connectivity: hexagonal lattice
gate evidence: no published figure

Technologies by layer — the machine's cell per layer

1 Qubit carrier
Transmon · primary ▣ §I; App. B, Fig. S2 (optical image of the processor) ✅
84 tunable transmons (Shenglian), 65 used in the CZ experiment
2 Encoding
Bare physical qubit (no encoding) · primary ◌ 🔎
bare transmon |0⟩/|1⟩ subspace; family-determined
3 Gate mechanism
Tunable-coupler CZ / iSWAP · primary ▣ §II; Fig. 2a (SRB/IRB); Fig. 3 (72 CZ gates) ✅
non-adiabatic CZ via tunable transmon couplers (48 ns); median 99.25% over 72 CZ, best 99.92% (IRB)
4 Connectivity / transport
Static nearest-neighbour lattice · primary ▣ App. B, Fig. S2 (topology graph) ✅
hexagonal lattice of qubits coupled via tunable couplers (nearest neighbour)
5 Control
Room-temperature electronics + per-qubit coax/flex · primary ◌ 🔎
room-temperature control copied from the sibling Baihua; not described in the paper
6 Readout
Dispersive microwave readout (+TWPA, Purcell) · primary ▣ Fig. 1(f) (three-state single-shot readout clouds) 🔎
three-state single-shot readout; dispersive by family
7 Code
— none — nothing in this layer ▤ 🔎
no QEC code; calibration/benchmarking experiment
8 Decoder
— none — nothing in this layer ▤ 🔎
no decoder; no QEC run
9 Interconnect
— none — nothing in this layer ◌ 🔎
single processor, no interconnect
10 Manufacturing
Superconducting-qubit lithography (Al/AlOx/Al junctions, Nb wiring, 300 mm) · primary ◌ 🔎
superconducting-qubit lithography; family-determined
evidence: ✅ 3 / 10