Entanglement Operator

An **entanglement operator** is a quantum operation (a unitary or measurement-based transformation) that creates or modifies **quantum entanglement** between particles or subsystems. It acts on multiple qubits so their states become correlated in a way that can’t be described independently. Common examples include two-qubit gates like the **CNOT** or **CZ** gates, which generate entangled Bell states from separable inputs.