Journal article
Path-encoded high-dimensional quantum communication over a 2-km multicore fiber
Department of Photonics Engineering, Technical University of Denmark1
Ultra-fast Optical Communication, Department of Photonics Engineering, Technical University of Denmark2
Centre of Excellence for Silicon Photonics for Optical Communications, Centers, Technical University of Denmark3
National Research Council of Italy4
Nanophotonic Devices, Department of Photonics Engineering, Technical University of Denmark5
Fiber Optics, Devices and Non-linear Effects, Department of Photonics Engineering, Technical University of Denmark6
University of Florence7
Quantum key distribution (QKD) protocols based on high-dimensional quantum states have shown the route to increase the key rate generation while benefiting of enhanced error tolerance, thus overcoming the limitations of two-dimensional QKD protocols. Nonetheless, the reliable transmission through fiber links of high-dimensional quantum states remains an open challenge that must be addressed to boost their application.
Here, we demonstrate the reliable transmission over a 2-km-long multicore fiber of path-encoded high-dimensional quantum states. Leveraging on a phase-locked loop system, a stable interferometric detection is guaranteed, allowing for low error rates and the generation of 6.3 Mbit/s of a secret key rate.
| Language: | English |
|---|---|
| Publisher: | Nature Publishing Group UK |
| Year: | 2021 |
| ISSN: | 20566387 |
| Types: | Journal article |
| DOI: | 10.1038/s41534-021-00398-y |
| ORCIDs: | Cozzolino, Daniele , Ding, Yunhong , Rottwitt, Karsten , Bacco, Davide , Oxenløwe, Leif Katsuo , 0000-0002-6671-0270 and 0000-0002-1359-7956 |
