Quantum Computing Questions
The controlled-controlled-V gate, also known as the Toffoli gate, is a three-qubit gate in quantum computing. It performs a controlled operation on the third qubit (target qubit) based on the states of the first two qubits (control qubits). If both control qubits are in the state |1⟩, the target qubit undergoes a phase flip operation, otherwise, it remains unchanged. The gate is commonly used in quantum algorithms for reversible classical computation and is a fundamental building block for constructing quantum circuits.