Parity switching in a full-shell superconductor-semiconductor nanowire qubit

Abstract

The rate of charge-parity switching in a full-shell superconductor-semiconductor nanowire qubit is measured by directly monitoring the dispersive shift of a readout resonator. At zero magnetic field, the measured switching time scale $T_P$ is on the order of 100 ms. Two-tone spectroscopy data post-selected on charge-parity is demonstrated. With increasing temperature or magnetic field, TP is at first constant, then exponentially suppressed, consistent with a model that includes both non-equilibrium and thermally activated quasiparticles. As TP is suppressed, qubit lifetime T1 also decreases. The long $T_P\sim 0.1$ s at zero field is promising for future development of qubits based on hybrid nanowires.

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Cited by in corpus (6)

• Progress in superconductor-semiconductor topological Josephson junctions
• Direct microwave spectroscopy of Andreev bound states in planar Ge Josephson junctions
• Josephson effect and critical currents in trivial and topological full-shell hybrid nanowires
• Flip-chip-based fast inductive parity readout of a planar superconducting island
• Side-gate modulation of supercurrent in InSb nanoflag-based Josephson junctions
• Strongly anharmonic flux-tunable transmon based on InAs-Al 2D heterostructure