Syndrome-based Piggybacking for Quantum Networks

The quantum internet has the potential to improve application functionalities by incorporating quantum information technology into the infrastructure of the overall internet. Moreover, by harnessing the qubit properties, new applications like QKD, quantum sensor networks and remote blind quantum computing are achievable. Quantum repeaters are the fundamental elements to allow quantum communications over long distances. These repeaters implement quantum communication protocols and route qubits through the network. To this latter purpose, the syndrome-based piggybacking can be exploited to inform quantum repeaters about the destination of qubits. The aim of this work is to investigate the piggybacking technique, by analysing its behaviour in both noiseless quantum channel conditions and noisy quantum channel conditions. Considering quantum communications based on QECCs, this technique allows to communicate classical bits through quantum channels without using classical channel and without consuming additional quantum resources.