Author

Tobias Bauer

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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

Highly indistinguishable photons from a tin-vacancy spin qubit in diamond

Quantum networks promise secure communication, distributed sensing and modular quantum computing by interconnecting distant quantum nodes through photonic links. Extending such networks beyond metropolitan distances requires quantum repeaters to overcome the exponential attenuation of photons in optical fiber. Across a...

Dennis Herrmann, Robert Morsch-Golsong, Tobias Bauer et al. · 1 citation

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