Orbital Angular Momentum States Enabling Fiber-based High-dimensional Quantum Communication

Daniele Cozzolino*, Davide Bacco, Beatrice da Lio, Kasper Ingerslev, Yunhong Ding, Kjeld Dalgaard, Poul Kristensen, Michael Galili, Karsten Rottwitt, Siddharth Ramachandran, Leif Katsuo Oxenløwe

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

320 Downloads (Pure)


Quantum networks are the ultimate target in quantum communication, where many connected users can share information carried by quantum systems. The keystones of such structures are the reliable generation, transmission, and manipulation of quantum states. Two-dimensional quantum states, qubits, are steadily adopted as information units. However, high-dimensional quantum states, qudits, constitute a richer resource for future quantum networks, exceeding the limitations imposed by the ubiquitous qubits. The generation and manipulation of such D-level systems have been improved over the last ten years, but their reliable transmission between remote locations remains the main challenge. Here, we show how a recent air-core fiber supporting orbital angular momentum (OAM) modes can be exploited to faithfully transmit D-dimensional states. Four OAM quantum states and their superpositions are created, propagated in a 1.2-km-long fiber and detected with high fidelities. In addition, three quantum-key-distribution protocols are implemented as concrete applications to assert the practicality of our results. This experiment enhances the distribution of high-dimensional quantum states, attesting the orbital angular momentum as a vessel for the future quantum network
Original languageEnglish
Article number064058
JournalPhysical Review Applied
Number of pages12
Publication statusPublished - 2019


Dive into the research topics of 'Orbital Angular Momentum States Enabling Fiber-based High-dimensional Quantum Communication'. Together they form a unique fingerprint.

Cite this