August 2020
Intermediate to advanced
582 pages
17h 59m
English
Content preview from Quantum ComputingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Controlled NOT (CNOT) Gate
While the NOT gate switches the states of single qubits, the CNOT gate juggles two qubits simultaneously—an atom-sized expansion of the capability of quantum gates but a gigantic breakthrough for computing. Since quantum programming doesn’t have the direct equivalents of if-then statements, the CNOT gate fills that gap. Moreover, learning to deal with two qubits opens the path for handling even more qubits, which is important if we want to use quantum computing for complex computational tasks.
The two qubits that the CNOT gate operates on are labeled as control and target, respectively. The CNOT gate is drawn as shown.
The top gray line represents the control qubit and the bottom gray line represents the target ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.