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CCN

abbreviationStandard termElectronics

A controlled-controlled-NOT gate is a logic gate used in reversible computing and quantum circuits.

A controlled-controlled-NOT gate, or Toffoli gate, flips its target qubit only if both control qubits are set to a logic high. It is a universal reversible logic gate, meaning any reversible boolean function can be constructed entirely from these gates. It prevents information loss during computation, which is a strict requirement for quantum circuit design.

Heard on the job

We synthesized the adder circuit using CCN gates to maintain reversibility.

Also heard as

  • Toffoli gate
  • CCNOT

Related terms

NOT gate

A digital logic gate that outputs the inverse of its input state.

AND gate

A fundamental digital logic circuit that outputs a high signal only when all its inputs are high.

Logic level

A specific voltage range that represents a distinct binary state in a digital circuit.

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