Regensburg 2022 – wissenschaftliches Programm

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QI: Fachverband Quanteninformation

QI 4: Poster: Quantum Information

QI 4.15: Poster

Montag, 5. September 2022, 18:00–20:00, P2

Entanglement distribution over a cryogenic microwave link — •Simon Gandorfer1,2, Michael Renger1,2, Wun Kwan Yam1,2, Florian Fesquet1,2, Kedar Honasoge1,2, Fabian Kronowetter1,2,3, Yuki Nojiri1,2, Maria-Teresa Handschuh1,2, Achim Marx1, Rudolf Gross1,2,4, and Kirill G. Fedorov1,21Walther-Meißner-Institut, 85748 Garching, Germany — 2Physik-Department, TUM, 85748 Garching, Germany — 3Rohde & Schwarz GmbH & Co. KG, 81671 Munich, Germany — 4Munich Center for Quantum Science and Technology, 80799 Munich, Germany

In the context of rapid progress in quantum technologies, the realization of hardware platforms for quantum communication networks is of utmost importance. Quantum local area networks connecting remote superconducting quantum nodes are crucial for the implementation of distributed quantum computing architectures. In this regard, we demonstrate a 6.5 m cryogenic link connecting two dilution cryostats via a cold network node. The respective microwave quantum communication channel is realized with superconducting microwave coaxial cables cooled to temperatures below 100 mK. By using this system, we demonstrate a successful distribution of squeezed states and two-mode entanglement between the remote dilution fridges and validate robustness of the quantum state transfer up to channel temperatures of 1 K.

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