ORNL Pathfinder

ORNL Pathfinder is a superconducting circuits quantum computer operated by Oak Ridge National Laboratory in USA. It has 20 physical qubits. It ranks 35 of 43 superconducting machines in this table by physical qubit count. 12 sourced specs are in the spec sheet. No benchmark figures are recorded for it yet.

Also known as IQM Radiance at ORNL

ORNL's first on-premises quantum computer, a 20-qubit IQM Radiance system launched on 16 June 2026 in the Quantum Computer Deployment Lab of the Translational Research Capability building. It connects to HPC systems in the NCCS Technology Integration Group test bed, and ORNL says it will be used with Frontier to develop hybrid workflows, but no direct Frontier link is stated, so no hpc_system_id is set. ORNL also operates a 6-qubit system named Quoll.

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	IQM Radiance 20-qubit quantum processor	Vendor reported	ORNL calls the system Pathfinder; IQM offers Radiance in 20, 54 and 150 qubit sizes.	ornl.gov iqm.tech
Qubit type	flux-tunable transmon (IQM qubit crystal family)	Vendor reported	Family-wide: from IQM's 20-qubit white paper, not an ORNL document.	arxiv.org
Topology	square lattice with tunable couplers (IQM qubit crystal family)	Vendor reported	Family-wide; ORNL pages do not state the topology.	iqm.tech arxiv.org
Max connectivity	4	Vendor reported	Inferred from the square nearest-neighbour lattice; family-wide, not stated by ORNL.	arxiv.org
Native gates	arbitrary X and Y rotations (PRX) and CZ	Vendor reported	IQM Radiance product page lists CZ as the native two-qubit gate.	iqm.tech arxiv.org
Single-qubit gate time	40 ns	Vendor reported	IQM Radiance page quotes a typical PRX duration of at most 40 ns; it is a product specification, not a measurement at ORNL.	iqm.tech
Two-qubit gate time	60 ns	Vendor reported	IQM page quotes typical CZ of at most 60 ns; the Garnet white paper says typically 20 to 40 ns.	iqm.tech arxiv.org
Cooling and environment	Bluefors dilution refrigerator: 4 K stage with helium compressors, base below 10 mK	Vendor reported	ORNL and OLCF pages are the same organisation.	ornl.gov olcf.ornl.gov
Operating temperature	10 mK	Vendor reported	ORNL says base temperature of the superconducting internals is less than 10 mK, so 10 is an upper bound.	ornl.gov olcf.ornl.gov
Power draw	24 kW	Vendor reported	IQM lists 24 kW typical for its 20-qubit Radiance configuration; ORNL does not state the draw.	iqm.tech
Fabrication	IQM fabrication facility in Espoo, Finland, flip-chip stack	Vendor reported	Family-wide statement from IQM's white paper; ORNL does not describe fabrication.	arxiv.org
Access and pricing	on-premises: owned and operated by ORNL, linked to the NCCS HPC test bed	Vendor reported	Described as ORNL's first commercially procured quantum computer; no external access or price is stated.	ornl.gov thequantuminsider.com

Timeline

2026-06-16: First operational
2026-10-04: Status checked: operational

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
IQM Garnet	IQM Quantum Computers	20	operational
IQM Radiance 20 for TOYO at G-QuAT	TOYO Corporation	20	planned
Alice & Bob Helium	Alice & Bob	18	operational
VLQ	IT4Innovations	24	operational
Rigetti 24-Qubit Testbed at NQCC	National Quantum Computing Centre	24	operational
OQC GENESIS (New York)	Oxford Quantum Circuits	16	under construction