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TT: Fachverband Tiefe Temperaturen
TT 30: Focus Session: Exploring Quantum Entanglement with Superconducting Qubits and Resonators (joint session QI/TT)
TT 30.5: Talk
Tuesday, March 19, 2024, 11:00–11:15, HFT-FT 131
Novel 3D circuit QED architecture for quantum information processing — •Desislava Atanasova1,2, Ian Yang1,2, Teresa Hönigl-Decrinis1,2, Daria Gusenkova3, Ioan Pop3, and Gerhard Kirchmair1,2 — 1Institute for Quantum Optics and Quantum Information, A-6020 Innsbruck, Austria — 2Institute for Experimental Physics, University of Innsbruck, A-6020 Innsbruck, Austria — 3Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
Superconducting circuits based on 3D architectures offer a way for hardware-efficient quantum information processing. Combined with nonlinearity, a single bosonic mode can replace a multi-qubit register, thus significantly reducing the required control electronics. Compared to their purely planar counterpart, 3D circuits possess longer lifetimes and a straightforward design that eases engineering the interactions in composite systems.
In this work, a superconducting coaxial cavity is coupled to a fluxonium qubit via a readout resonator. The tunability of the qubit, provided by a magnetic flux hose, is used to adjust the cavity-qubit interaction in situ. Combined with an element for two-photon dissipation, this setup could be utilized as an improved building block for a fully protected logical qubit.
Keywords: fluxonium; high-Q cavity; granular aluminum; superconducting qubits; bosonic qubits