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A new version of SD Connect and SD Desktop will be available from Monday, September 28. The major upgrade will introduce significant improvements, but also includes changes that are not compatible with the current version of the service. Click here to review the available support materials.

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.

Q20 Service in MyCSC

There are currently some issues with the Q20 service for projects that have Q20 allocations. If you cannot find the Aalto-Q20 service or are otherwise experiencing issues please contact the CSC Service Desk at servicedesk@csc.fi.

Aalto Q20

Aalto Q20 is a superconducting IQM quantum computer operated by Aalto University.

Specification

Property Value
Qubits 20
Operator Aalto University
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 Two broken coupler between qubits 16 and 17, and between qubits 9 and 14
Terms of use None

Runtime identifiers

Use these values when targeting Q20 in a SLURM job or in Qiskit/Cirq, see Running quantum jobs for full examples.

ID Context Value
DEVICE_VALUE SLURM DEVICES value radiance20
QUANTUM_COMPUTER_ID IQMProvider quantum_computer= argument radiance20
CORTEX_URL Cortex URL environment variable Q20_CORTEX_URL

Topology

Q20's qubits are connected to their nearest neighbours in a square lattice.

Topology mapping (Click to show)

Q20's node mapping

Access

Q20 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