Dresden 2026 – scientific programme
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QI: Fachverband Quanteninformation
QI 18: Quantum Communication
QI 18.3: Talk
Thursday, March 12, 2026, 15:45–16:00, BEY/0245
Entanglement distribution in hybrid-variable microwave networks — •Simon Gandorfer1,2, Ivan Solomakhin1,2, Maria-Teresa Handschuh1,2, Joan Agustí1,2, Achim Marx1, Peter Rabl1,2,3, Rudolf Gross1,2,3, and Kirill G. Fedorov1,2,3 — 1Walther-Meißner- Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2School of Natural Sciences, Technische Universität München, 85748 Garching, Germany — 3Munich Center for Quantum Science and Technology, 80799 Munich, Germany
Distributing entanglement between distant nodes of a large-scale quantum network is a fundamentally important milestone for quantum information processing. In particular, quantum entanglement is crucial for quantum teleportation protocols or logical quantum gates with remote qubits. In our experiment, we investigate remote entanglement of discrete-variable qubits by using contiunuos-variable entangled signals. The latter is represented by the two-mode squeezed microwaves generated with Josephson parametric circuits, while the former are given by superconducting transmons in 3D cavities. We observe a build-up of entanglement between the qubits due to their interaction with the common, quantum-correlated, reservoir. The corresponding entanglement conversion between continuous- and discrete-variables allows for promising and robust, hybrid-variable, quantum microwave networks. Finally, we discuss possible extensions and applications of our findings for distributed quantum computing architectures.
Keywords: entanglement distribution; microwaves; superconducting qubit; quantum communication