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OQC ATHENA

Oxford Quantum Circuits

OQC ATHENA

Oxford Quantum Circuits · superconducting circuits · PLANNED (2031) · 75000 physical qubits · access: n/a

Register profile — the machine's variant of its architecture

qubit type: next-generation multi-mode superconducting qubit
gate evidence: no published figure
flags: a target, not a device

Technologies by layer — the machine's cell per layer

1 Qubit carrier
Transmon · primary ▥ 🔎
multi-mode superconducting qubit of the Dimon (transmon) lineage; 75,000 lattice sites (2031)
— (Atlas gap: ∅G-dimon) · alternate ▥ ATHENA card ('next-generation multimode qubits') ✅
roadmap names 'next-generation multimode qubits' for ATHENA — the Dimon's multimode single-device dual rail
2 Encoding
Dual-rail (erasure) encoding · primary ▥ 🔎
dual-rail encoding of the Dimon lineage (GENESIS: 'dual-rail-encoded logical qubit'); not restated for this system
3 Gate mechanism
— undisclosed — exists, nothing published ▥ 🔎
no gate mechanism published
4 Connectivity / transport
— undisclosed — exists, nothing published ▥ 🔎
lattice topology not published
5 Control
Vertical (out-of-plane) signal delivery — VIO, coaxmon, 3D wiring · primary ◌ 🔎
OQC's out-of-plane Coaxmon control lineage; not stated for this system
6 Readout
Mid-circuit erasure check · primary ◌ 🔎
error-detected dual-rail readout (GENESIS lineage); not stated for this system
7 Code
— undisclosed — exists, nothing published ▥ 🔎
5,000 logical qubits at 1e-9 targeted; no code published
8 Decoder
— undisclosed — exists, nothing published ▥ 🔎
no decoder published for the 1e-9, 3 MHz logical target
9 Interconnect
— undisclosed — exists, nothing published ▥ ATHENA card ('modular system optimisation') ✅
'modular system optimisation supporting tens of thousands of lattice sites'; module links not published
10 Manufacturing
Superconducting-qubit lithography (Al/AlOx/Al junctions, Nb wiring, 300 mm) · primary ▥ ATHENA card ✅
'foundry-grade quantum processor unit, fabricated on 200 mm wafers'
evidence: ✅ 3 / 11