@article {sulimany_high-dimensional_2025,
	title = {High-dimensional coherent one-way quantum key distribution},
	journal = {npj Quantum Inf},
	volume = {11},
	number = {1},
	year = {2025},
	note = {Publisher: Nature Publishing Group},
	pages = {16},
	abstract = {High-dimensional quantum key distribution (QKD) offers secure communication with key rates that surpass those of QKD protocols utilizing two-dimensional encoding. However, existing high-dimensional QKD protocols require additional experimental resources, such as multiport interferometers and multiple detectors, thereby increasing the cost of high-dimensional systems and limiting their use. We introduce and analyze a high-dimensional QKD protocol that requires only standard two-dimensional hardware. We provide security analysis against individual and coherent attacks, establishing upper and lower bounds on the secure key rates. We tested our protocol on a standard two-dimensional QKD system over a 40 km fiber link, achieving a twofold increase in secure key rate compared to the standard two-dimensional coherent one-way protocol, without any hardware modifications. This work offers a significant improvement in the performance of already deployed QKD systems through simple software updates and holds broad applicability across various QKD schemes, making high-dimensional QKD practical for widespread use.},
	keywords = {Fibre optics and optical communications, Information theory and computation, Photonic devices, quantum information},
	issn = {2056-6387},
	doi = {10.1038/s41534-025-00965-7},
	url = {https://www.nature.com/articles/s41534-025-00965-7},
	author = {Sulimany, Kfir and Pelc, Guy and Dudkiewicz, Rom and Korenblit, Simcha and Eisenberg, Hagai S. and Bromberg, Yaron and Ben-Or, Michael}
}
