Synthetic clock states generated in a Bose-Einstein condensate via continuous dynamical decoupling

Radiofrequency- or microwave-dressed states have been used in NV center and ion-trap experiments to extend coherence times, shielding qubits from magnetic field noise through a process known as continuous dynamical decoupling (1). Such field-insensitive dressed states, as applied in the context of ultracold neutral atoms, have applications related to the creation of novel phases of spin-orbit-coupled quantum matter (2). We present observations of such a protected dressed-state system in a Bose-Einstein condensate, including measurements of the dependence of the protection on rf coupling strength, and estimates of residual field sensitivities. \\ (1) Rabl, P. et al. Strong magnetic coupling between an electronic spin qubit and a mechanical resonator. Phys.~Rev.~B 79, 041302 (2009). \\ (2) Campbell, D.~L. \& Spielman, I.~B. Rashba realization: Raman with RF. New J. Phys. 18, 033035 (2016).