Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session C33: Noise Reduction and Error Mitigation in Quantum Computing II
3:00 PM–6:00 PM,
Monday, March 15, 2021
Sponsoring
Unit:
DQI
Chair: Daniel Egger, IBM Research - Zurich
Abstract: C33.00008 : Diagnosing Gate Errors in Superconducting Qubits Using Continuous Measurements (Experiment)*
4:24 PM–4:36 PM
Live
Presenter:
Gerwin Koolstra
(Lawrence Berkeley National Laboratory)
Authors:
Gerwin Koolstra
(Lawrence Berkeley National Laboratory)
Noah Stevenson
(Univ of California - Berkeley)
Karthik Siva
(Univ of California - Berkeley)
William Livingston
(Univ of California - Berkeley)
Ravi K. Naik
(Univ of California - Berkeley)
John Steinmetz
(University of Rochester)
Debmalya Das
(University of Rochester)
Andrew N Jordan
(University of Rochester)
David Ivan Santiago
(Lawrence Berkeley National Laboratory)
Irfan Siddiqi
(Univ of California - Berkeley)
requires an accurate model of the qubit dynamics in response to the applied control pulse. In this work, we use continuous measurement of a superconducting qubit to continuously track the qubit state during a gate, and reconstruct the magnitude and type of error from measured voltage records. We demonstrate this method on imperfect gates, and show that the reconstructed dynamics accurately reveals both the dynamics due to the applied control pulse and errors such as over-rotations and leakage out of the computational subspace.
*This work was supported by the Army Research Office and the Office of Advanced Scientific Computing Research, Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
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