Skip to content
QubitWire
Saved
COMPANY RESEARCH · Enabling technology

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.

Official website ↗
Sweden · Research brief reviewed 22 Sept 2026

Initial record: initial research brief recorded.

Review history 1 record

Record dates use UTC and 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.

  1. Initial research brief recorded

    Research reviewed 22 Sept 2026

    Open this evidence record →

    Sources in this record (2)
Identity & attribution
Organization record
Sweden Quantum (organization-sweden-quantum)
Recorded role
Enabling Technologies, Cloud & Infrastructure
Recorded aliases
No aliases recorded in this assessment.
Name and period
No dated name or ownership transition is recorded here. An alias is a search aid, not evidence of a legal ownership relationship.
Product scope
Low-loss infrared-blocking filters for cryogenic measurement and control lines.

A company profile may discuss several systems. Capabilities remain attached to the product and conditions named in each source; they do not transfer automatically to related organizations. A verified security relationship has not been attached to this record.

Report an identity issue →
TECHNOLOGY & ACCESS

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 ↗
DOCUMENTED EVIDENCE

What the sources establish

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.

swedenquantum.com ↗chalmers.se ↗

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.

Open research questions

Editorial questions for this profile. No reviewed closure decision has been recorded; unanswered questions do not lower the official score.

Open research question

Can users reproduce the intended low-loss filtering behavior in their complete cryogenic signal path with the actual device and wiring included?

What evidence would help

A source addressing this question must identify the named system, experiment or deployment, its conditions, measured outcome and remaining limitations. Are performance limits stated under realistic loads and operating conditions?

What would resolve it?

An editorial review must explain which part of this question the evidence resolves. A roadmap or an announcement alone does not close it.

No resolved, partial or disputed outcome is asserted without a reviewed transition and its evidence.

Suggest evidence
Open research question

Which named system or service can I use under the documented access route?

What evidence would help

Check the current terms for filter models, datasheets and quotes. Identify the system version, eligibility, restrictions and whether the result used hardware or simulation.

What would resolve it?

Current primary documentation must identify the offering, eligible user and access conditions. An unspecified company-level access claim is insufficient.

No resolved, partial or disputed outcome is asserted without a reviewed transition and its evidence.

Suggest evidence
Open research question

Are performance limits stated under realistic loads and operating conditions?

What evidence would help

Provide the source location, relevant product or generation, workload, resource constraints and reported uncertainty. Keep measurements, simulations and announced targets distinct.

What would resolve it?

A source reviewer must map the evidence to this exact scope. Missing disclosure remains unknown; it is not technical failure.

No resolved, partial or disputed outcome is asserted without a reviewed transition and its evidence.

Suggest evidence

Questions are drawn from the existing brief and sector reading guide. Research brief reviewed 22 Sept 2026. Following stores a local bookmark; it does not send email alerts or imply a scheduled review.

Since your review

Scope: Sweden Quantum. Reading a page never marks its records reviewed.

Keep a baseline and explicitly mark the evidence you have reviewed. This optional journal stays in this browser.

Existing material records remain available after setup. Routine rechecks and initial entries are excluded from material counts.

Public 7-day, 30-day & full history →

A claim-to-assessment source trace is not available for this directory record.

CHECK THE ORIGINALS

Sources & evidence

  1. Sweden Quantum product range ↗Official company information · Publication date not stated

    Identifies HERD models, legal entity and component-level application scope.

  2. Chalmers spin-off context ↗Research-institution directory · Publication date not stated

    Identifies Sweden Quantum and its filter-development focus as a separate company.