Trieste Quantum Seminar Series:

Quantum Communication Technology: State of the Art and Challenges Ahead

Prof. Marco Lucamarini
School of Physics, Engineering, and Technology, York Centre for Quantum Technologies, University of York, UK

Abstract: Quantum communication technologies are rapidly evolving from theoretical concepts to engineered systems capable of securing information with the laws of physics rather than mathematical complexity. In this talk, I will introduce the basic principles of quantum communication and quantum key distribution (QKD), explain why quantum mechanics guarantees their security, and discuss the main challenges to real-world implementation, including transmission distance and system reliability. I will then review recent breakthroughs such as twin-field QKD, which has extended secure communication beyond 1000 km of optical fibre, and highlight ongoing developments in satellite links, quantum repeaters, and next-generation optical fibres. Finally, I will outline how these advances are shaping the future quantum internet and positioning Europe at the forefront of this technological revolution.