Dressed Efimov trimers in periodically driven magnetic fields

The interactions between three identical atoms are driven by means of oscillating magnetic fields near a Feshbach resonance, and the properties of dressed Efimov states are investigated. A three-body approach is constructed by combining the adiabatic hyperspherical representation approach along with a quasi-static Floquet representation. This theoretical framework permits the description of the three-body dynamics to be expressed in terms of hyperspherical potential curves spanning over different Floquet manifolds. It is found that the potential curve landscape of three atoms intrinsically differs from the undriven case giving rise to a class of dressed trimer states experiencing a short range three-body repulsion. The latter depends on the driving frequency as well as the strength of the modulating magnetic fields paving the way for lifetime tunability of dressed Efimov states.