Applications
A circuit is useful when it answers a question somebody already has. This section takes four of those questions, shows the smallest fqkit program that carries the idea, and then points at the lesson that goes further.
Read them in order if you are new. Each page stands on its own if you already know the circuit it uses.
How every sector page is organized
- The question: what a person in that field is trying to find out.
- The quantum idea: the one feature of a circuit that helps.
- A toy you can run: few qubits, gates fqkit already has, and the output the simulator prints.
- Follow up: a change to make yourself, then the lesson or notebook that continues the same idea.
- The real scale: what changes when the problem is no longer a toy, including what this toolkit does not do.
The path
| Sector | The question | Start from | |
|---|---|---|---|
| 1 | Chemistry | What is the energy of a small molecule? | Variational algorithms |
| 2 | Telecommunications | How do two parties send more information than the channel seems to hold? | The Bell state |
| 3 | Physics | How does a spin, a clock, or an interferometer read a phase? | Interference |
| 4 | Cryptography | How do two people share a secret that an eavesdropper disturbs? | Superposition |
| 5 | Further sectors | Optimization, sensing, materials, and medicine | The four pages above |
ℹ️
The toys use the gates fqkit can draw: H, RX, RY, RZ, CNOT, CZ, SWAP, and Toffoli. A rotation by stands in for a bit flip or a phase flip. Qubit 0 is the top wire and the leftmost bit.
Last updated on