High‐Dimensional Quantum Communication: Benefits, Progress, and Future Challenges (Adv. Quantum Technol. 12/2019)
Daniele Cozzolino, Beatrice Da Lio, Davide Bacco, Leif Katsuo Oxenløwe · Advanced Quantum Technologies · 2019
Quantum communication with states living in d-dimensional Hilbert spaces, qudits, yields great benefits. The main and clear advantage is that they can carry a larger amount of information per particle compared to 2D systems, qubits. The cover image figuratively shows this principle. However, qudits generation, transmission, and detection are not simple tasks to accomplish. Davide Bacco, Leif Katsuo Oxenløwe, and co-workers (article number 1900038) review the state-of-the-art on these topics, involving high-dimensional photonic quantum states, highlighting their advantages, issues, and future perspectives.