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HL: Fachverband Halbleiterphysik
HL 34: Quantum Dots and Wires: Telecom Wavelength
HL 34.1: Vortrag
Mittwoch, 11. März 2026, 16:30–16:45, POT/0051
All-photonic quantum teleportation at telecom wavelength with frequency converted photons from remote quantum dots — •Tim Strobel1, Michal Vyvlecka1, Ilenia Neureuther1, Tobias Bauer2, Marlon Schäfer2, Stefan Kazmaier1, Nand Lal Sharma3, Raphael Joos1, Jonas H. Weber1, Cornelius Nawrath1, Weijie Nie3, Ghata Bhayani3, Caspar Hopfmann3, Christoph Becher2, Peter Michler1, and Simone Luca Portalupi1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Quantum Science and Technology (IQST) and SCoPE, University of Stuttgart, Stuttgart, Germany — 2Fachrichtung Physik, Universität des Saarlandes, Saarbrücken, Germany — 3Institute for Integrative Nanosciences, Leibniz IFW Dresden, Dresden, Germany
A future terrestrial quantum internet relies on distant quantum network nodes connected via optical fiber channels. In this context, semiconductor quantum dots (QDs) are promising sources of quantum light. Here, we report on an all-photonic quantum teleportation experiment with photons from remote QDs emitting at ca. 780 nm. The polarization state of a single photon emitted by one QD is prepared and interfaced with one photon of an entangled pair from a second QD in a Bell state measurement. This process teleports the polarization state onto the second photon of the entangled pair. Polarization-preserving quantum frequency converters eliminate the frequency mismatch between photons, allowing for interference at telecom wavelengths. Teleportation succeeds with post-selected fidelities up to 0.721(33).
Keywords: Teleportation; Quantum Dots; Quantum Frequency Conversion; Telecommunication Wavelength; Entanglement