Quantum technologies, with the limits left in.
“Quantum” covers three quite different families of technology. Sensing, computing and communication rest on the same physics, but they differ completely in maturity, in cost and in what they can do today.
This page sets out what each one does, where it has been demonstrated, its current limits, and the evidence Ramerion would need before claiming any prototype or offering.
01Three families
Sensing, computing and communication are not interchangeable.
Most confusion about quantum technology comes from treating these as one field with one timeline.
| Family | What it does | Demonstrated today | Main limits |
|---|---|---|---|
| Quantum sensing | Uses quantum states of atoms or light as extremely stable references for time, motion and fields. | Atomic clocks — themselves quantum sensors — underpin precise timing for satellite navigation. Other quantum sensors are in active development. | Size, power, sensitivity to the environment, calibration, and integration into working systems. |
| Quantum computing | Processes information with qubits, which may give advantages on specific classes of problem. | Demonstrations on research hardware; NIST notes that none has yet proved truly useful in practice. | Noise and error rates, scale, and advantage that depends on the problem. Classical computing remains the baseline. |
| Quantum communication and security | Quantum key distribution and quantum random-number generation — and, separately, post-quantum cryptography. | QKD has demonstrated implementations. NIST finalised its first post-quantum cryptography standards in 2024. | QKD needs special-purpose equipment and cannot authenticate the sender on its own. No technology makes a system unhackable. |
02Quantum sensing
The most mature family — and still an integration problem.
Quantum sensors measure time, acceleration, rotation, gravity or magnetic fields against quantum references. Getting from a laboratory instrument to a dependable field system means solving size, power, calibration, environmental sensitivity and data integration. Ramerion does not manufacture quantum sensors.
Precision inertial navigation
Future possibilityAtom-based accelerometers and gyroscopes that could keep navigation accurate when satellite-navigation signals are unavailable or degraded.
Manufacturers describe this capability; independent evidence in the conditions that matter is what a claim would require.
Timing and synchronisation
Future possibilityAtomic and optical clocks as stable time references for networks, navigation and distributed measurement.
Gravity and magnetic-field measurement
Future possibilitySensitive gravimeters and magnetometers that could detect small variations in mass or field.
Geophysical investigation
Future possibilityApplying gravity and magnetic measurements to surveying what lies below the surface.
Infrastructure and structural monitoring
Future possibilityWhether such sensors could add information to the monitoring of structures and plant — explored on Quantum in Engineering & Risk.
03Quantum computing
Advantage depends on the problem, and has to be shown.
Quantum computers may one day outperform classical ones on particular problems. For most real-world workloads that advantage has not been established, so every idea below starts and ends with a comparison against the best classical method.
Selected optimisation problems
Future possibilityScheduling, routing or allocation problems where the structure might suit quantum or quantum-inspired approaches.
Quantum-inspired algorithms run on classical hardware and are not quantum computing.
Materials and molecular simulation
Future possibilitySimulating quantum behaviour in materials and molecules — widely seen as one of the more natural long-term uses.
Complex scenario analysis
Future possibilitySampling and simulation methods for analysing many possible outcomes under uncertainty.
Engineering and financial modelling
Future possibilitySpecific modelling problems connected to engineering and financial risk.
No promise of faster, cheaper or more accurate results. Any such claim would need a controlled comparison with the best classical method on the same problem — and would be published with its method and limits.
04Communication and security
Four technologies that are easy to confuse.
Quantum key distribution, quantum random-number generation, post-quantum cryptography and conventional encryption do different jobs. The NSA, for example, recommends post-quantum cryptography over QKD for most uses as more cost-effective and easier to maintain.
| Technology | What it is | Runs on | What it does not do |
|---|---|---|---|
| Quantum key distribution (QKD) | Distributes encryption keys using quantum states of light, so that interception disturbs them. | Special-purpose optical equipment and links. | Authenticate the sender by itself, or secure the endpoints and the rest of the system. |
| Quantum random-number generation | Produces random numbers from quantum processes, for use in keys and protocols. | Dedicated hardware devices. | Fix weaknesses elsewhere in a cryptographic system. |
| Post-quantum cryptography (PQC) | Standardised public-key algorithms designed to resist attack by quantum computers (NIST FIPS 203, 204 and 205). | Existing computers and networks — it is classical cryptography. | Replace sound key management or careful implementation. |
| Conventional encryption and key management | The established algorithms, protocols and key-handling practices most systems use today. | Existing computers and networks. | Protect long-lived data against future quantum attack where it relies on vulnerable public-key algorithms — the reason to plan a PQC migration. |
05Relevance and evidence
What would have to be true before anything is claimed.
No technology-readiness levels or timelines are given here; they would be guesses.
| Family | Potential relevance to Ramerion | Evidence needed before a claim |
|---|---|---|
| Quantum sensing | Navigation and timing for space systems; future monitoring of structures and plant. | Access to suitable sensors, field trials against conventional instruments, and documented calibration and integration results. |
| Quantum computing | Selected optimisation and simulation problems in engineering and financial risk. | Controlled comparisons against the best classical methods on the same problem, showing a real advantage in accuracy, cost or time. |
| Communication and security | Long-term security planning for systems Ramerion builds — mainly through post-quantum cryptography. | A cryptographic inventory and a tested migration plan for real systems; QKD only where infrastructure and threat model justify it. |
06Scientific limits
What this research does not claim.
Not claimed
- That Ramerion manufactures quantum sensors or quantum computers.
- That quantum computing currently outperforms classical methods on any problem Ramerion works on.
- That quantum communication is unhackable or secures a system on its own.
- Any timeline or technology-readiness level for these technologies.
Where things stand
- Quantum sensing has the clearest demonstrated uses, led by atomic timekeeping.
- Practical quantum computing advantage for real-world workloads is not yet established.
- Post-quantum cryptography is standardised and runs on today's computers; it is the practical route to quantum-resistant security.
07Further reading
Technical references.
- NISTQuantum information science (external site)Overview of quantum computing, sensing and networking, and NIST's role in standards.
- NIST · updated 2 April 2026Quantum Sensing Explained (external site)How quantum sensors work; the atomic clock as a quantum sensor.
- NISTAtomic Clocks (external site)Atomic clocks as the basis of precise timing for technologies such as GPS.
- NIST · updated 28 May 2026Quantum Computing Explained (external site)Why early demonstrations have not yet proved practically useful, and how far off most applications are.
- NIST · 13 August 2024NIST Releases First 3 Finalized Post-Quantum Encryption Standards (external site)FIPS 203, 204 and 205.
- NIST Computer Security Resource CenterPost-Quantum Cryptography project (external site)PQC algorithms that interoperate with existing protocols and networks.
- U.S. National Security AgencyQuantum Key Distribution (QKD) and Quantum Cryptography (QC) (external site)Practical limitations of QKD, and why post-quantum cryptography is preferred for most uses.
- Infleqtion (vendor material)Quantum Inertial Sensing for Navigation (external site)A manufacturer's description of quantum inertial sensing for navigation when GNSS is unavailable — a vendor claim, not independent evidence.
08Related
Where these questions are applied.
Collaborate
Researching quantum technology? Compare notes with us.
We welcome physicists, engineers and students interested in testing quantum ideas honestly against real problems and classical baselines.