Sweden Quantum
Sweden Quantum develops filters that reduce unwanted high-frequency radiation reaching cold quantum devices while preserving the useful signal path. Its HERD product family targets superconducting and spin-qubit experiments, including measurement and control lines. The company addresses the balance between radiation suppression and unwanted signal attenuation.
Sweden · Research reviewed 22 Sept 2026Initial record: initial research brief recorded.
Review history 1 record
Record dates show when an assessment or clarification was saved. Review dates show the evidence check. Earlier records were recovered from QubitWire’s source history; no earlier score movement is inferred.
Initial research brief recorded
· Research reviewed 22 Sept 2026Sources in this record (2)
What it does. Where it fits.
Low-loss infrared-blocking filters for cryogenic measurement and control lines.
Who should look closer
Editorial assessment: Cryogenic-system teams comparing filtering options and assessing how radiation protection interacts with the available readout signal and thermal budget.
QubitWire’s editorial assessment of practical fit.Filter models, datasheets and quotes
The official site provides separate HERD-1 and HERD-2 product information plus quotation and configuration routes. Specifications should be matched to the selected generation and connector configuration.
Check the current access route ↗What has been demonstrated
The current catalog documents two filter generations and links research examples using HERD. It identifies Sweden Quantum AB as the legal company. The linked use cases are evidence of component integration, not a blanket performance guarantee.
What remains unresolved
Attenuation and insertion loss belong to a specified model, frequency range and test setup. A filter’s presence in a successful experiment does not establish that it alone caused the measured coherence.
The next question to watch
Can users reproduce the intended low-loss filtering behavior in their complete cryogenic signal path with the actual device and wiring included?
A research question, not a promised milestone.QubitWire coverage
No published QubitWire stories currently match this organization. The evidence sources below provide the starting point.
Sources & evidence
- Sweden Quantum product range ↗Official company information · Publication date not stated
Identifies HERD models, legal entity and component-level application scope.
- Chalmers spin-off context ↗Research-institution directory · Publication date not stated
Identifies Sweden Quantum and its filter-development focus as a separate company.
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