We demonstrate long-distance quantum teleportation using two engineered, dissimilar quantum dots. The network combines fiber links with a 270 m free-space channel stabilized and synchronized via GPS. The system reaches 82 ± 1% fidelity, clearly surpassing the classical limit, showing the feasibility of solid-state quantum relays.
Congratulations to our team members F. Salusti, J.N Claro-Rodriguez and G. de Pascalis for their involvement.
A huge congratulations to E. Berger and T. Mikitta for successfully defending their Master’s theses! We’re thrilled to see them continue with us as PhD students and wish them great success in their upcoming research journey.
We demonstrate a scalable quantum networking testbed running on Deutsche Telekom’s metropolitan fiber network in Berlin. Using commercial quantum devices and standard telecom hardware, we distribute polarization-entangled photons over 10 m to ~100 km while coexisting with bidirectional classical traffic. With active polarization stabilization, we achieve 85–99% entanglement fidelity and reliable multiday operation, confirming the feasibility of…
We develop an efficient method to compute time-integrated, frequency-resolved photon correlations for pulsed excitation. Using the sensor approach, we show that spectral filtering reduces multiphoton noise and enhances single-photon purity in time-bin states. Filtering the central peak of a driven two-level system improves coherence and time-bin entanglement fidelity, making spectral filtering crucial for optimizing pulsed quantum light…
We are pleased to announce that the 716. WE-Heraeus-Seminar '2D Materials for Photonic Quantum Technologies', which our institute is diligently helping to organize, will take place from 27 May to 28 May 2021. Click me to find out more.
