Study of different performance measures and their relations in satellite-based and terrestrial quantum communication

Abstract

Rapid developments in quantum communication are paving the way forward for more advanced technologies. Conventional channels like optical fibres have been a great resource in recent decades. However, they suffer largely from exponential transmissivity decays and are not suitable for very long-distance communication. Satellite links along with quantum cryptography can be the foundation of modern quantum communication systems. This work presents an overview of the hybrid quantum repeater with a detailed analysis of different parametric relations in satellite-based communication from experimental data. The link efficiency between the satellite-based scheme and terrestrial scheme is also compared, emphasising the satellite-based scheme's importance for quantum communication. Finally, we present a performance analysis of different quantities and derive relations between them.