Dresden 2026 – scientific programme
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QI: Fachverband Quanteninformation
QI 18: Quantum Communication
QI 18.2: Talk
Thursday, March 12, 2026, 15:30–15:45, BEY/0245
Microwave quantum communication over thermal quantum networks — •Wun Kwan Yam1,2, Simon Gandorfer1,2, Maria-Teresa Handschuh1,2, Achim Marx1, Rudolf Gross1,2,3, and Kirill G. Fedorov1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2School of Natural Sciences, Technical University of Munich, 85748 Garching, Germany — 3Munich Center for Quantum Science and Technology, 80799 Munich, Germany
Quantum communication in the microwave regime is set to play an important role in distributed quantum computing and hybrid quantum networks. In a step towards practical quantum networks, we demonstrate quantum teleportation of microwave coherent states over a thermal quantum network composed of two spatially-separated dilution refrigerators, achieving teleportation fidelities of 72.3 % at channel temperatures of 1 K and 59.9 % at 4 K. Furthermore, we theoretically analyze quantum communication of discrete-variable qubit states using a continuous-variable two-mode squeezing resource state, paving the way towards hybrid quantum communication protocols. Our results show the experimental feasibility of distributed superconducting architectures and motivate further investigations of noisy quantum networks in various frequency regimes.
Keywords: thermal quantum network; quantum teleportation; quantum secret sharing; hybrid protocols; microwave