Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulses

Daniel Burgarth*, Paolo Facchi, Martin Fraas, Robin Hillier

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
6 Downloads (Pure)


Dynamical decoupling is the leading technique to remove unwanted interactions in a vast range of quantum systems through fast rotations. But what determines the timescale of such rotations in order to achieve good decoupling? By providing an explicit counterexample of a qubit coupled to a charged particle and magnetic monopole, we show that such time-scales cannot be decided by the decay profile induced by the noise: even though the system shows a quadratic decay (a Zeno region revealing non-Markovian noise), it cannot be decoupled by periodic spin echo pulses, no matter how fast the rotations.

Original languageEnglish
Article number027
Pages (from-to)1-15
Number of pages15
JournalSciPost Physics
Issue number2
Publication statusPublished - Aug 2021

Bibliographical note

Copyright D. Burgarth et al. Published by the SciPost Foundation. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


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