Distribution of genuine high-dimensional entanglement over 10.2 km of noisy metropolitan atmosphere
Lukas Bulla, Kristian Hjorth, Oskar Kohout, Jan Christian Lang, Sebastian Ecker, Sebastian Philipp Neumann, Julius Bittermann, Robert Kindler, Marcus Huber, Martin Bohmann, Rupert Ursin, Matej Pivoluska · Physical Review A · 2023
The authors investigate the dimensionality of photonic quantum entanglement distributed through a 10.2-km atmospheric link connecting a building in the center of Vienna to a distant laboratory in Bisamberg. An atypical approach to time-bin encoding was employed to analyze the data. The results show that the distributed data cannot be explained by qubits alone, indicating the presence of high-dimensional entanglement in the system.