GCRI · Quantum Technologies
Dependencies and consequences
Quantum technology depends on rare materials, specialised components, cryogenics, lasers and scarce expertise, and its effects reach every system that relies on cryptography, precise timing or navigation. This page sets out the causal, physical, economic and social links between quantum technologies and other systems, how disruption could travel along them and how the platform analyses them. A dependency map describes connections; it is not a forecast of when any capability will arrive.
- STEM methods
- 5
- Canonical methods this field applies
- Topics
- 8
- Subject pages in the field
- Counterparts
- 5
- Platforms in shared fields across the network
- Report series
- 2
- Reports series it contributes to
Upstream dependencies.
| Dependency | Why it matters | Exposure |
|---|---|---|
| Cryogenics and helium | Many qubit technologies operate near absolute zero | Specialised refrigeration and constrained helium supply |
| Lasers, photonics and vacuum systems | Control and readout for trapped ions, atoms and photons | Few specialised suppliers |
| Advanced materials and fabrication | Superconducting circuits, isotopically pure materials, detectors | Concentrated manufacturing capacity |
| Classical computing and control electronics | Error correction and control require fast classical processing | Shares supply chains with semiconductors |
| Skilled people | Physics, engineering and software expertise | Small, internationally mobile talent pool |
Field overview.
The screen a team would use to follow this subject: its measures, states and decisions. Names are examples and values are illustrative.
Downstream consequences.
Cryptography
Communications, payments, software updates and identity that rely on public-key cryptography must migrate before a capable quantum computer exists.
Precision
Quantum clocks and sensors could reduce dependence on satellite navigation, which matters for telecoms, power grids and finance.
Strategic competition
Export controls, research security and concentration of capability shape who benefits and who is exposed.
Mechanisms.
The cryptographic channel is the clearest. Many systems share the same algorithms and libraries, so a weakness in one class of algorithm is a common-mode failure across sectors. Long-lived devices, embedded systems and archived data extend exposure far into the future, and a migration is only as strong as the slowest supplier. Payments and Market Infrastructure at The Global Risks Alliance (GRA) examines what this means for financial plumbing.
A second channel is expectation. Overstated claims can redirect investment and policy, and a correction can strand both. The platform therefore reports demonstrated results separately from projections; see quantum computing and responsible quantum innovation.
How dependencies are analysed.
Analysis uses probability and statistics to treat uncertain timelines as distributions rather than dates, and cryptographic analysis to map where vulnerable algorithms sit. Each map states its assumptions and uncertainty; see methods and uncertainty. Back to the field overview.
Questions and answers.
Is a dependency map a forecast of when quantum computers will break encryption?
Why does the slowest supplier matter?
Why are skills a dependency?
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