Quantum Computing Questions
The controlled-controlled-Hadamard gate, also known as the Toffoli gate, is a three-qubit gate in quantum computing. It applies the Hadamard gate to the target qubit if and only if both control qubits are in the state |1⟩. Otherwise, it leaves the target qubit unchanged. This gate is commonly used in quantum algorithms for various computational tasks, including reversible computing and error correction.