N-qubit Quantum Teleportation, Information Splitting and Superdense Coding through the composite GHZ-Bell Channel

TL;DR

This paper presents a versatile entangled quantum channel combining GHZ and Bell states, enabling efficient quantum teleportation, information splitting, and superdense coding for multiple qubits, with protocols demonstrated for various system sizes.

Contribution

It introduces a general odd-qubit entangled system that enhances quantum communication protocols and provides explicit methods for teleportation and information splitting.

Findings

2N+1 classical bits transmitted with N+1 qubits

Five-qubit system supports arbitrary one and two qubit teleportation

Protocols for N-qubit state teleportation and splitting are detailed

Abstract

We introduce a general odd qubit entangled system composed of GHZ and Bell pairs and explicate its usefulness for quantum teleportation, information splitting and superdense coding. After demonstrating the superdense coding protocol on the five qubit system, we prove that '2N +1' classical bits can be sent by sending 'N+1' quantum bits using this channel. It is found that the five-qubit system is also ideal for arbitrary one qubit and two qubit teleportation and quantum information splitting (QIS). For the single qubit QIS, three different protocols are feasible, whereas for the two qubit QIS, only one protocol exists. Protocols for the arbitrary N-qubit state teleportation and quantum information splitting are then illustrated.