Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session B47: Superconducting Tunable Couplers & Gates I
11:30 AM–2:30 PM,
Monday, March 4, 2024
Room: 200CD
Sponsoring
Unit:
DQI
Chair: Peter Groszkowski, Oak Ridge National Laboratory
Abstract: B47.00008 : Control strategies for static ZZ coupling in flux-tunable transmon coupler systems*
1:18 PM–1:30 PM
Presenter:
Simon Pettersson Fors
(Chalmers University of Technology)
Authors:
Simon Pettersson Fors
(Chalmers University of Technology)
Jorge Fernández-Pendás
(Chalmers University of Technology)
Anton Frisk Kockum
(Chalmers University of Technology)
In this talk, we present strategies to mitigate and control the ZZ coupling in devices based on fixed-frequency transmon qubits and flux-tunable transmon couplers. These strategies, which are based on numerical and analytical modeling, provide information on how to choose the frequencies, anharmonicities, and coupling strengths of the qubit systems. This allows us to create several parameter regions with mitigated ZZ coupling that can be accessed by current technology without major redesigns. We also describe the underlying reasons for the existence of these regions inferred from new diagrammatic perturbation theory.
*This research was funded by the Knut and Alice Wallenberg Foundation through the Wallenberg Center for Quantum Technology (WACQT), the EU Flagship on Quantum Technology H2020-FETFLAG-2018-03 Project No. 820363 OpenSuperQ and the EU Flagship on Quantum Technology HORIZON-CL4-2022-QUANTUM-01-SGA Project No. 101113946 OpenSuperQPlus100.
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