Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session T75: Understanding and Mitigating Decoherence in Superconducting Qubits
11:30 AM–2:06 PM,
Thursday, March 9, 2023
Room: Room 401/402
Sponsoring
Unit:
DQI
Chair: Joao Basso, University of California, Berkeley
Abstract: T75.00006 : Enhancing the coherence of superconducting qubits with electric fields*
12:54 PM–1:06 PM
Presenter:
Jürgen Lisenfeld
(Karlsruhe Institute of Technology)
Authors:
Jürgen Lisenfeld
(Karlsruhe Institute of Technology)
Alexander Bilmes
(Karlsruhe Institute of Technology)
Alexey V Ustinov
(Karlsruhe Institute of Technology)
Here we show that qubit coherence can be improved by tuning dominating defects away from the qubit resonance. In our experiments, such defects are tuned by exposing the qubit sample to a DC-electric field. Using a simple algorithm to optimize the applied electric field bias, we found that the average T1-time of a transmon qubit could be enhanced by 23%.
This technique can also be implemented in superconducting quantum processors to enable simultaneous coherence optimization of all qubits.
*We gratefully acknowledge funding of this work by Google.
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