General Quantum Protocol for Communication via n --Qubit GHZ States
This study develops a generalized n-bit superdense coding protocol using an entangled n-qubit GHZ state to transmit n classical bits and n-1 qubits. The novelty lies in an explicit, scalable encoding routine that uses only single-qubit Pauli X and Z gates on the GHZ channel. Experimental results show success rates drop with message length, circuit depth, and gate count, suggesting improvements through better coherence or shorter message segments.