Selective decoupling in multi-level quantum systems by the SU(2) sign anomaly
Abstract
We investigate dynamical decoupling operated by 2π-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
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