Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session W38: Control and Characterization Tools for Quantum Error Mitigation
8:00 AM–10:48 AM,
Friday, March 6, 2020
Room: 607
Sponsoring
Unit:
DQI
Chair: Timothy Proctor, Sandia National Laboratories
Abstract: W38.00001 : Demonstrating error rate homogenization using dynamically corrected gates in a trapped ion system
View Presentation
Abstract
Presenter:
Claire Edmunds
(Univ of Sydney)
Authors:
Claire Edmunds
(Univ of Sydney)
Cornelius Hempel
(Univ of Sydney)
Alistair Milne
(Univ of Sydney)
Michael Biercuk
(Univ of Sydney)
We perform parallel single-qubit operations on a multi-qubit register of 171Yb+ ions using a microwave field. We achieve a best case single-qubit average error rate of 1.9e-5 using primitive gates, although inhomogeneous fields lead to an order of magnitude variation across the 10 qubit register. By using DCGs, we observe an 8.5x reduction in the spread of error rates across the register, and a 2.4x improvement of the average value. Furthermore, DCGs provide an added robustness to slow drifts in the control, reducing the overhead required for regular calibrations.
Finally, we discuss a microwave synthesis chain using a cryogenic sapphire oscillator and an arbitrary waveform generator, aimed at improving the control-field phase noise and reducing the calibration requirements compared to traditional I/Q.
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