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We demonstrate the use of shortcuts to adiabaticity protocols forinitialisation, readout, and coherent control of dressed states generated byclosed-contour, coherent driving of a single spin. Such dressed states haverecently been shown to exhibit efficient coherence protection, beyond whattheir two-level counterparts can offer. Our state transfer protocols yield atransfer fidelity of ~ 99.4(2) % while accelerating the transfer speed by afactor of 2.6 compared to the adiabatic approach. We show bi-directionality ofthe accelerated state transfer, which we employ for direct dressed statepopulation readout after coherent manipulation in the dressed state manifold.Our results enable direct and efficient access to coherence-protected dressedstates of individual spins and thereby offer attractive avenues forapplications in quantum information processing or quantum sensing.

Initialisation of single spin dressed states using shortcuts to adiabaticity