Selective decoupling in multi-level quantum systems by the SU(2) sign anomaly

Abstract

We investigate dynamical decoupling operated by $2\ddot{I}€$-pulses in a two-level subspaces of a multilevel system showing that it may leads 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 use to control internode interaction or actively suppress decoherence

6 pages, 1 figure