Overview
- A University of Stuttgart–led team reported the first transfer of quantum information between photons emitted by two different quantum dots.
- The setup linked the sources over roughly 10 meters of optical fiber, with one dot producing a single photon and the other an entangled pair.
- Quantum frequency converters from Saarland University compensated residual color differences so the photons could interfere.
- Teleportation succeeded at just over 70 percent, and the researchers plan to raise reliability by stabilizing the quantum dots and improving fabrication.
- The peer-reviewed study appears in Nature Communications and is part of the Quantenrepeater.Net consortium, which previously preserved quantum-dot entanglement over a 36-kilometer city fiber route.