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

3 Citations (Scopus)
4 Downloads (Pure)

Abstract

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
Volume11
Issue number2
DOIs
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.

Fingerprint

Dive into the research topics of 'Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulses'. Together they form a unique fingerprint.

Cite this