Quantum/Machines/OQC Toshiko
United Kingdom · operational · Superconducting circuits
OQC Toshiko
OQC Toshiko is a superconducting circuits quantum computer operated by Oxford Quantum Circuits in United Kingdom. It has 32 physical qubits. It ranks 31 of 43 superconducting machines in this table by physical qubit count. 9 sourced specs are in the spec sheet. No benchmark figures are recorded for it yet.
Also known as Toshiko 32-qubit platform
OQC's 32-qubit platform announced on 27 November 2023 in private preview, with deployments described in commercial data centres in the UK, Japan and Spain and plans for wider cloud availability. The announcement gives no fidelity or coherence numbers. OQC's separate GENESIS system in New York is not counted here.
Spec sheet
Technical details as the builder or a paper states them, each with its own source. A blank is a fact we could not source, not a zero. Fidelity and coherence figures are in the benchmark table below.
| Spec | Value | Basis | Note | Source |
|---|---|---|---|---|
| Processor | Toshiko QPU, 35 fixed-frequency coaxmon qubits of which 32 are connected | Peer reviewed | Paper describes Toshiko Gen-1 in a Tokyo data centre; OQC markets it as a 32-qubit platform. | arxiv.orgoqc.tech |
| Qubit type | fixed-frequency coaxmon transmon, aluminium on sapphire | Peer reviewed | Qubits and readout resonators sit on opposite sides of the substrate with 3D coaxial control wiring. | arxiv.orgoqc.tech |
| Topology | capacitive coupling between neighbouring qubits on a fixed coupling graph | Peer reviewed | The paper benchmarks a connected 16-qubit chain; full coupling graph is shown only as a figure. | arxiv.org |
| Native gates | echo cross resonance (ECR) two-qubit gate and SX single-qubit gate | Peer reviewed | ECR durations range from 250 ns to 460 ns depending on the qubit pair; median SX fidelity 99.9%. | arxiv.org |
| Software | NVIDIA CUDA-Q integration | Vendor reported | Both are OQC releases from 27 Nov 2023; OQC also cites NVIDIA GH200 Grace Hopper for hybrid workloads. | prnewswire.comoqc.tech |
| Access and pricing | private preview at launch, then public cloud and data-centre fabric; hosted in colocation data centres | Vendor reported | Release dated 27 Nov 2023; the paper reports systems in London, Tokyo and at CESGA in Spain; no price stated. | prnewswire.comoqc.tech |
| Predecessor | OQC Lucy (8 qubits) | Vendor reported | OQC devices page lists Lucy at 8 qubits and Sophia at 4 as earlier generations. | oqc.tech |
| Successor | OQC GENESIS (New York) | Vendor reported | OQC calls GENESIS its fourth-generation device and Toshiko the third. | oqc.techoqc.tech |
| Roadmap | next platforms of hundreds of qubits | Vendor reported | OQC stated this on 27 Nov 2023; no timeline was given. | prnewswire.comoqc.tech |
Timeline
- 2023-11-27: Announced
More from Oxford Quantum Circuits
- OQC GENESIS (New York) (under construction, 16 qubits)
Comparable superconducting machines
Closest in physical qubit count within the same technology. Counts of different qubit types are not interchangeable across technologies.
| Machine | Operator | Qubits | Status |
|---|---|---|---|
| Rigetti Cepheus-1-36Q | Rigetti Computing | 36 | operational |
| Fraunhofer IBM Quantum System One | Fraunhofer-Gesellschaft | 27 | operational |
| VLQ | IT4Innovations | 24 | operational |
| Rigetti 24-Qubit Testbed at NQCC | National Quantum Computing Centre | 24 | operational |
| VTT Q50 | VTT | 50 | operational |
| ORNL Pathfinder | Oak Ridge National Laboratory | 20 | operational |