1. What does “quantum” mean?
Quantum mechanics describes how very small things behave — atoms, electrons, particles of light. At that scale the world is grainy: energy is exchanged in tiny fixed portions, or “quanta”, not continuously.
Knowledge Base · Quantum 101
Quantum in ten minutes, no physics degree required.
This is not a physics course. It exists so that as a decision-maker, teacher, engineer or curious reader you can understand what quantum technology is, what it can and cannot do, and why it became one of the defining technology questions of this decade.
No mathematics needed. Every concept comes with an everyday analogy, and every block hides a longer explanation you can open.
In five minutes
Six ideas, and you have the essentials.
The entire literature of quantum technology rests on these six ideas. It is enough to understand them once, properly.
2. The qubit
A classical bit is either 0 or 1. A qubit is a physical system — an atom, a photon, a superconducting circuit — that can hold a combination of 0 and 1 until it is measured.
3. Superposition
Superposition is a state in which a quantum system carries several possibilities at once, in defined proportions. It is not ignorance on our part: the possibilities are genuinely present together, and they influence each other.
4. Entanglement
Two entangled particles behave as one system: measuring one immediately tells you what you will measure on the other, however far apart they are.
5. The cost of measurement
You cannot look at a quantum state without changing it. Anyone eavesdropping leaves a trace. Anyone trying to copy it fails.
6. Why is it so hard?
Quantum states are fragile. Heat, vibration and stray magnetic fields all blur them. This is decoherence, and it is the main adversary of today's quantum technology.
Why now?
Four reasons this cannot wait for the next decade.
01
Today's encryption has an expiry date
Much of the internet's encryption rests on mathematical problems that a sufficiently large quantum computer can solve. That moment is known as “Q-day”.
02
The defences already exist
You do not have to wait for a quantum computer: Post-Quantum Cryptography (PQC) means standardised algorithms running on today's hardware, and quantum key distribution networks are already being built across Europe.
03
Industry, defence, healthcare — tangible benefits
Quantum technology is not only about computers. Quantum sensors, atomic clocks and imaging methods already deliver measurable advantages, from GPS-free navigation to materials inspection.
04
Positions in Europe and Hungary are being set right now
EU programmes, national strategies and large funding calls are distributing the roles of the coming decade. Missing this window means entering later at a far higher cost.
Setting the record straight
Four misconceptions we meet often.
“Quantum computers will compute everything faster.”
No. They offer an advantage only on specific classes of problems — factoring, quantum chemistry, some optimisation and simulation tasks. For spreadsheets, websites and databases, classical machines remain the right tool.
“This is science fiction for decades to come.”
Large error-corrected machines are indeed years away. But quantum communication, quantum sensors, atomic clocks and post-quantum cryptography are purchasable, deployable technologies today.
“Entanglement allows instant communication.”
It does not. Entangled measurements are correlated but individually random — transmitting information always also needs a classical channel that is no faster than light.
“This is purely a physics problem, not ours.”
Most of the work is organisational: which of our data must remain secret in ten years, where do we use vulnerable cryptography, which suppliers are prepared. Those are IT and leadership questions, not laboratory ones.
Where next?
If this page gave you the foundations, there are two good directions from here — or come straight to us.