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Warning!

Puhti and Mahti computing services have been decommissioned and no new jobs are accepted or executed on its compute nodes. Puhti and Mahti login nodes and storage services are planned to remain available until 15 October 2026. Clean up unnecessary files and move any data you need to keep by 31 August 2026. See the Roihu data migration guide for instructions on transferring your data to Roihu.

VTT Q50

Q50 is a 53-qubit superconducting quantum computer co-developed by VTT Technical Research Centre of Finland and IQM using superconducting qubits.

Specifications

Property Value
Qubits 53
Operator VTT Technical Research Centre of Finland
Manufacturer IQM
Qubit technology Superconducting
Topology Square lattice (2D grid, nearest-neighbour connectivity)
Native gates Two-qubit Controlled-Z (CZ) and one-qubit Phased RX (PRX)
Known hardware issues Tunable coupler between qubits QB18 and QB10 is currently broken
Terms of use VTT Q50 Terms of Use (EULA). The project PI is responsible for ensuring it is followed

Runtime identifiers

Use these values when targeting Q50 in a SLURM job or in Qiskit/Cirq code — see Running quantum jobs for full examples.

ID Context Value
DEVICE_VALUE SLURM DEVICES value q50
QUANTUM_COMPUTER_ID IQMProvider quantum_computer= argument q50
CORTEX_URL Cortex URL environment variable Q50_CORTEX_URL

Topology

Q50's qubits are arranged in a square lattice, where each qubit interacts directly with its nearest neighbours.

Topology mapping (Click to show)

Q50's node mapping

Access

Q50 is accessed through the supercomputing environment. Apply for a quantum computing project to gain access.

Next step

See how to run a quantum job

Further Reading