Multi-qubit teleportation and multi-bit superdense coding via cascade splitting

In this study, we present a simplified version of the quantum teleportation protocol for n -qubits and a generalized version of the superdense coding protocol for n -bits; in both cases, thanks to the cascade splitting technique. Both protocols will be analyzed on three notably different platforms: Quirk simulator, IBM QASM simulator of the IBM Q Experience program, and an optical table. The experiments on the three platforms show the excellent performance of both protocols. Finally, an analysis, about the immunity of these protocols in the presence of an eavesdropper is incorporated.