Hadamard Gate
A single-qubit gate that creates an equal superposition of |0⟩ and |1⟩ from a basis state.
📖 In-Depth Explanation
The Hadamard gate transforms |0⟩ to (|0⟩+|1⟩)/√2 and |1⟩ to (|0⟩−|1⟩)/√2. It's one of the most commonly used gates, essential for creating superposition at the start of many quantum algorithms.