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In the last episode (check here), we stepped into the lab and asked a deceptively simple question: how do you actually build a quantum computer?
Now it’s time to zoom in on one of the most elegant and promising answers:
Use atoms themselves.
Literally take individual atoms, the fundamental building blocks of matter, and turn them into qubits.
The Simplest Quantum Machine You Can Imagine
If you strip quantum computing down to its bare essence, you need just one thing:
A system that behaves as a two-level system. A two-level system is something that can exist in exactly two distinct states with one level representing 0 and the other representing 1.
You might wonder—this is exactly what is required for a classical computer as well. However, an additional ingredient is needed: superposition (check episode #12), which allows a quantum computer to exist in superposed states and truly function as a quantum device.
So the question becomes:
Can we identify a natural system that inherently behaves as a two-level system and supports superposition?
