Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulses
Dynamical decoupling is the leading technique to remove unwanted interactions in a vast range of quantum systems through fast rotations. But what determines the time-scale of such rotations in order to achieve good decoupling? By providing an explicit counterexample of a qubit coupled to a charge...
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| Format: | Article |
| Language: | English |
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SciPost
2021-08-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.11.2.027 |
| _version_ | 1818722624461602816 |
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| author | Daniel Burgarth, Paolo Facchi, Martin Fraas, Robin Hillier |
| author_facet | Daniel Burgarth, Paolo Facchi, Martin Fraas, Robin Hillier |
| author_sort | Daniel Burgarth, Paolo Facchi, Martin Fraas, Robin Hillier |
| collection | DOAJ |
| description | Dynamical decoupling is the leading technique to remove unwanted interactions
in a vast range of quantum systems through fast rotations. But what determines
the time-scale 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. |
| first_indexed | 2024-12-17T20:57:35Z |
| format | Article |
| id | doaj.art-d936803552f94bc5b5f57ce5ab8de406 |
| institution | Directory Open Access Journal |
| issn | 2542-4653 |
| language | English |
| last_indexed | 2024-12-17T20:57:35Z |
| publishDate | 2021-08-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics |
| spelling | doaj.art-d936803552f94bc5b5f57ce5ab8de4062022-12-21T21:32:49ZengSciPostSciPost Physics2542-46532021-08-0111202710.21468/SciPostPhys.11.2.027Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulsesDaniel Burgarth, Paolo Facchi, Martin Fraas, Robin HillierDynamical decoupling is the leading technique to remove unwanted interactions in a vast range of quantum systems through fast rotations. But what determines the time-scale 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.https://scipost.org/SciPostPhys.11.2.027 |
| spellingShingle | Daniel Burgarth, Paolo Facchi, Martin Fraas, Robin Hillier Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulses SciPost Physics |
| title | Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulses |
| title_full | Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulses |
| title_fullStr | Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulses |
| title_full_unstemmed | Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulses |
| title_short | Non-Markovian noise that cannot be dynamically decoupled by periodic spin echo pulses |
| title_sort | non markovian noise that cannot be dynamically decoupled by periodic spin echo pulses |
| url | https://scipost.org/SciPostPhys.11.2.027 |
| work_keys_str_mv | AT danielburgarthpaolofacchimartinfraasrobinhillier nonmarkoviannoisethatcannotbedynamicallydecoupledbyperiodicspinechopulses |