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QI: Fachverband Quanteninformation
QI 10: Focus Session: Exploring Quantum Entanglement with Superconducting Qubits and Resonators (joint session QI/TT)
QI 10.3: Vortrag
Dienstag, 19. März 2024, 10:30–10:45, HFT-FT 131
Investigation of hybrid CV-DV entanglement in the microwave regime — •Simon Gandorfer1,2, Yuki Nojiri1,2, Fabian Kronowetter1,2, Kedar E. Honasoge1,2, Maria-Teresa Handschuh1,2, Joan Agustí1,2, 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 (MCQST), 80799 Munich, Germany
Distributing entanglement between spatially separated nodes of a large-scale quantum network is a fundamentally important milestone for many applications. It also provides the quantum resource for various quantum protocols, such as quantum teleportation or remote qubit gate operations. In our experiment, we employ a superconducting transmon qubit in a superconducting 3D aluminium cavity illuminated by one mode of a microwave two-mode squeezed (TMS) state. Here, the TMS state acts as a quantum-correlated reservoir. By choosing an appropriate set of observables, we identify a joint measurement between the qubit and the second mode of the TMS state that allows us to observe a hybrid, discrete-continuous variable, entanglement. We experimentally investigate the entanglement conversion process in this novel hybrid regime and discuss its possible extensions and applications for distributed quantum computing.
Keywords: Entanglement conversion; Hybrid entanglement