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Abstract
This paper investigates the improvement of qubit coherence in superconducting quantum bits by tuning away dominating defects from the qubit resonance using an applied DC-electric field. The authors demonstrate a method to optimize the applied field bias, enhancing the average qubit T₁ time by 23%. They also discuss the implementation of local gate electrodes in superconducting quantum processors for simultaneous in situ coherence optimization of individual qubits.
Publisher
npj Quantum Information
Published On
Jan 25, 2023
Authors
Jürgen Lisenfeld, Alexander Bilmes, Alexey V. Ustinov
Tags
qubit coherence
superconducting quantum bits
DC-electric field
T₁ time
local gate electrodes
quantum processors
coherence optimization

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