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Author

Jürgen Eschner

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Preprint Sep 2026

An asymmetric atom-photon architecture for device-independent quantum key distribution over 25 km

Device-independent quantum key distribution (DIQKD) can guarantee security without trusting the internal workings of the measurement devices, but extending it to fiber networks demands high-quality entanglement, reliable heralding, and faithful photon transmission simultaneously. Here, we address these requirements in...

Jonas Meiers, Christian Haen, Max Bergerhoff et al. · 0 citations
Preprint Jul 2026

Telecom-compatible polarization-to-time-bin conversion of atom-photon entanglement for heterogeneous quantum networks

A key enabling feature of future quantum networks is interoperability between platforms that operate at different wavelengths and with different qubit encodings. We demonstrate an interface that converts atom-photon entanglement from polarization encoding at an atomic wavelength to time-bin encoding in the telecom C-ba...

Christian Haen, Julian Groß-Funk, Max Bergerhoff et al. · 3 citations

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