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Springer series in solid-state sciences

Deterministic Quantum Devices for Optical Quantum Communication

Sven Rodt, Philipp‐Immanuel Schneider, Lin Zschiedrich, Tobias Heindel, S. Bounouar, Markus Kantner, Thomas Koprucki, Uwe Bandelow, Sven Burger, Stephan Reitzenstein

Published Jan 1, 2020• 5 citations
Publisher
DOI
10.1007/978-3-030-35656-9_8

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The 2- to 2.5-$\ensuremath{\mu}$m waveband enjoys reduced solar background and low propagation losses in the atmosphere and hollow-core optical fibers. However, harnessing these advantages for optical quantum communications has proved challenging due to a lack of suitable quantum light sources and detectors. The authors demonstrate in this waveband a source of entangled photons that is suitable for generating secure keys for quantum key distribution, and provide device-independent certification of the entanglement. These results are promising for the future implementation of device-independent secure optical quantum communications in daylight.