Dynamical Decoupling using Universal Optimal Tracking
Abstract
Dynamical decoupling (DD) is a widely used and resource-efficient technique for error suppression, but conventional DD relies on periodically repeating a short pulse block to refocus the qubit state during idle periods. Imperfections in this block cause residual errors to accumulate, ultimately degrading state recovery over long idle times. Here, we introduce a universal optimal tracking approach that extends the original tracking concept to a fully state-independent setting for designing DD sequences. By monitoring the qubit's evolution at predefined waypoints during optimization, the method dynamically compensates residual errors while preserving regular refocusing. Experimental demonstrations on a superconducting-qubit platform confirm the suppression of error accumulation under static control imperfections, in agreement with numerical predictions. Complementary simulations further show that optimal-tracking-based sequences maintain strong performance under time-dependent noise. These results establish optimal tracking as a practical and hardware-agnostic approach to designing short, robust DD sequences suitable for noisy quantum devices.
Related
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BibTeX
@misc{devra2026dynamical,
title = {{Dynamical Decoupling using Universal Optimal Tracking}},
author = {Amit Devra and Emanuel Malvetti and Niklas J. Glaser and Abhishek Agarwal and Ivan Rungger and Santana Lujan and Max Werninghaus and Stefan Filipp and Léo Van Damme and Steffen J. Glaser},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2606.21762},
eprint = {2606.21762},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2606.21762},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Dynamical Decoupling using Universal Optimal Tracking
AU - Amit Devra
AU - Emanuel Malvetti
AU - Niklas J. Glaser
AU - Abhishek Agarwal
AU - Ivan Rungger
AU - Santana Lujan
AU - Max Werninghaus
AU - Stefan Filipp
AU - Léo Van Damme
AU - Steffen J. Glaser
PY - 2026
DA - 2026/10/25
PB - arXiv
DO - 10.48550/arxiv.2606.21762
UR - https://arxiv.org/abs/2606.21762
AB - Dynamical decoupling (DD) is a widely used and resource-efficient technique for error suppression, but conventional DD relies on periodically repeating a short pulse block to refocus the qubit state during idle periods. Imperfections in this block cause residual errors to accumulate, ultimately degrading state recovery over long idle times. Here, we introduce a universal optimal tracking approach that extends the original tracking concept to a fully state-independent setting for designing DD sequences. By monitoring the qubit's evolution at predefined waypoints during optimization, the method dynamically compensates residual errors while preserving regular refocusing. Experimental demonstrations on a superconducting-qubit platform confirm the suppression of error accumulation under static control imperfections, in agreement with numerical predictions. Complementary simulations further show that optimal-tracking-based sequences maintain strong performance under time-dependent noise. These results establish optimal tracking as a practical and hardware-agnostic approach to designing short, robust DD sequences suitable for noisy quantum devices.
ER -