Quantum computing supply chain chokepoints

category tradeable chokepoint

How scores are shown

Criticality comes from the trace model and describes the node's dependency importance.

Evidence comes from the canonical Vein Graph: AI assertions, user corrections, and external sources.

Completeness is a data-coverage label based on available summary, evidence, sources, tickers, and chokepoint rationale.

Dynamic claims are capped below 100% and AI-only edges remain labeled as inferred. Model: trace-score-v1.

Dilution refrigerators90% confidence — Only a few vendors build production-grade dilution fridges; lead times exceed a year.

Helium-3 & cryogenic supply90% confidence — Helium supply shocks raise operating costs and downtime risk for cryogenic systems.

Quantum computing hardwareAdvanced computing

Qubit fabrication, cryogenic control, and error mitigation stack.

Criticality: unknownEvidence: UnverifiedCompleteness: thin

Dilution refrigeratorsCryogenics⚠ chokepoint

Milli-kelvin cooling for superconducting and spin qubits.

Only a few vendors build production-grade dilution fridges; lead times exceed a year.90% confidence

IBM—IBMstock

ProducerSupplies into this nodeSupply-chain context only — not investment advice.

Criticality: highEvidence: UnverifiedCompleteness: partial

Helium-3 & cryogenic supplyMaterials⚠ chokepoint

Helium isotopes and cryo plumbing for continuous operation.

Helium supply shocks raise operating costs and downtime risk for cryogenic systems.90% confidence

Criticality: highEvidence: UnverifiedCompleteness: partial

— core tradeable element

Josephson junction fabricationFabhigh criticality

Aluminum junction qubits patterned on silicon wafers in cleanrooms.

Criticality: highEvidence: UnverifiedCompleteness: thin

— core tradeable element

Microwave control electronicsElectronicsmedium criticality

Room-temperature control racks and FPGA pulse generation.

Criticality: mediumEvidence: UnverifiedCompleteness: thin

— core tradeable element

Cryogenic wiring & IOComponentsmedium criticality

Attenuated lines and flex wiring from 300K to mK stages.

Criticality: mediumEvidence: UnverifiedCompleteness: thin

— core tradeable element

Generated analysis — not investment advice.

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