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KetQat

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Glossary

Every technical term this platform uses, with what it means and — the part that is harder to find elsewhere — the mistake it prevents. On this subject the intuitive reading is often the wrong one, so each entry says what a reader would otherwise get wrong.

Circuits

Statevector

The complete description of a quantum state, as one amplitude per possible outcome.

Easy to get wrong: It doubles in size with every qubit, so a statevector simulation is exact and small only. It also does not survive measurement — measuring collapses the state.

Seen in use on /workbench