Fig. 1
From: Shell potentials for microgravity Bose–Einstein condensates
Schematic representation of rf dressing and bubble-potential creation. a A two-level system in a magnetic trap undergoing rf dressing; at left, the bare picture of a trapped state and an antitrapped state with an rf signal resonant at a particular point in space, at right, the dressed-state picture with adiabatic potentials. b A realistic five-level system (\(F=2\)) in an atom-chip style magnetic trap as discussed in the text. The initial trapping potential (blue) can be adiabatically converted to the dressed potential (red), depicted at right with an expanded vertical scale. In both cases energy levels are split by Zeeman shifts in the bare picture and by coupling strength \(\Omega\) in the dressed picture. The shell potential can be visualized by considering these curves as slices through a 3D potential; thus, trapped atoms will reside at the ‘notches’ of the curves at right which have associated trap frequencies \(\sim\)100–1000 Hz, depending on specific dressing parameters.
