IBM Quantum System One, Ehningen

Raveh Neeman

doi:10.5281/zenodo.22674814

Fraunhofer-Gesellschaft · superconducting circuits · DEPLOYED (2021); since Oct 2024 Fraunhofer's renewed IBM contract gives access to IBM's utility-scale Eagle/Heron systems in the IBM Europe Quantum Data Center, Ehningen; no 2025-26 report on the 27-qubit System One (Jun 2021) · 27 physical qubits · access: Fraunhofer Quantum Computing Competence Network (companies and research organisations)

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

Register profile — the machine's variant of its architecture

flags: no published error rates, source not confirmed

Technologies by layer — the machine's cell per layer

1 Qubit carrier	Transmon · primary ▨ 🔎 27-qubit IBM Falcon processor at launch (2021); transmon not stated in the opened sources
2 Encoding	Bare physical qubit (no encoding) · primary ◌ 🔎 bare transmon two-level subspace
3 Gate mechanism	Cross-resonance (fixed-frequency, all-microwave) · primary ◌ 🔎 Falcon generation: fixed-frequency cross-resonance gates (family-determined; not stated in the opened sources)
4 Connectivity / transport	Static nearest-neighbour lattice · primary ◌ 🔎 static nearest-neighbour lattice (Falcon; not stated in the opened sources)
5 Control	Room-temperature electronics + per-qubit coax/flex · primary ◌ 🔎 room-temperature electronics (family-determined)
6 Readout	Dispersive microwave readout (+TWPA, Purcell) · primary ◌ 🔎 dispersive readout (family-determined)
7 Code	— none — nothing in this layer ◌ 🔎 no QEC code run on this machine located
8 Decoder	— none — nothing in this layer ◌ 🔎 no decoder; no QEC run
9 Interconnect	— none — nothing in this layer ◌ 🔎 single-processor System One; no interconnect
10 Manufacturing	Superconducting-qubit lithography (Al/AlOx/Al junctions, Nb wiring, 300 mm) · primary ◌ 🔎 IBM superconducting-qubit fabrication (family-determined)

evidence: ✅ 0 / 10