https://doi.org/10.1140/epjs/s11734-026-02190-5
Regular Article
Selective decoupling in multilevel quantum systems by the SU(2) sign anomaly
1
Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università di Catania, Via Santa Sofia 64, 95123, Catania, Italy
2
Dipartimento di Matematica e Informatica, Università di Catania, Viale Andrea Doria 64, 95123, Catania, Italy
3
Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Via Santa Sofia 64, 95123, Catania, Italia
4
CNR-IMM, Catania (University Unit), Consiglio Nazionale delle Ricerche, Via Santa Sofia 64, 95123, Catania, Italia
a
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Received:
15
July
2025
Accepted:
5
February
2026
Published online:
18
February
2026
Abstract
We investigate dynamical decoupling operated by 
-pulses in a two-level subspace of a multilevel system showing that it may lead to selective decoupling. This provides a flexible strategy for decoupling transitions in a quantum network, when control to directly address them is not available, which can be used to control internode interaction or actively suppress decoherence.
© The Author(s) 2026
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