2018/01/10 by Takuya Ikuta, Hiroki Takesue · 1 citation
Computer Science · Physics and Astronomy · #Algorithm #Amplitude damping channel #Bin #Computer science #Photon #Photon entanglement #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum capacity #Quantum channel #Quantum entanglement #Quantum information #Quantum information science #Quantum key distribution #Quantum mechanics #Quantum network #Quantum teleportation #Superdense coding #quant-ph
paper · pdf · doi:10.1038/s41598-017-19078-z
published as Scientific Reports 8, Article number: 817 (2018) · 9 pages, 3 figures, 1 table, supplementary materials are available on the publisher's site
openalex publication_date 2018/01/10 · arxiv created 2018/01/19 · arxiv updated 2018/01/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
High-dimensional quantum entanglement can enrich the functionality of quantum information processing. For example, it can enhance the channel capacity for linear optic superdense coding and decrease the error rate threshold of quantum key distribution. Long-distance distribution of a high-dimensional entanglement is essential for such advanced quantum communications over a communications network. Here, we show a long-distance distribution of a four-dimensional entanglement. We employ time-bin entanglement, which is suitable for a fibre transmission, and implement scalable measurements for the high-dimensional entanglement using cascaded Mach-Zehnder interferometers. We observe that a pair of time-bin entangled photons has more than 1 bit of secure information capacity over 100 km. Our work constitutes an important step towards secure and dense quantum communications in a large Hilbert space.