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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

Circuit depth

How many layers of operations run one after another, rather than side by side.

Easy to get wrong: Depth, not gate count, sets how long a circuit takes and how much time it has to decohere. A wide shallow circuit and a narrow deep one with the same gate count behave completely differently.

Seen in use on /workbench