Reversible computing | Logic gates | Quantum gates

Fredkin gate

The Fredkin gate (also CSWAP gate and conservative logic gate) is a computational circuit suitable for reversible computing, invented by Edward Fredkin. It is universal, which means that any logical or arithmetic operation can be constructed entirely of Fredkin gates. The Fredkin gate is a circuit or device with three inputs and three outputs that transmits the first bit unchanged and swaps the last two bits if, and only if, the first bit is 1. (Wikipedia).

Fredkin gate
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Qubit | Truth function | Quantum entanglement | Reversible computing | Quantum circuit | Negation | Function (mathematics) | Billiard-ball computer | Quantum programming | Logical conjunction | Permutation matrix | Logical disjunction | Toffoli gate | Conservation of mass | Exclusive or | Quantum computing