Non-equilibrium physics is a particularly fascinating field of current research.Generically, driven systems are gradually heated up so that quantum staff effects die out.In contrast, we show that a driven central spin model including controlled dissipation in a highly excited state allows us to Vacuum Cloth Filter distill quantum coherent states, indicated by a substantial reduction of entropy.
The model is experimentally accessible in quantum dots or molecules with unpaired electrons.The potential of preparing and manipulating coherent states by designed driving potentials is pointed out.