Extended Data Fig. 4: Influence of the transparency beam.
We let the experiment reach a steady state with the transparency beam off. At t = 0, we switch the beam on and observe the system’s evolution. We show the BEC atom number and the phase-space density ρD in the dimple (top). The blue dotted line indicates our BEC detection limit in terms of condensed atom number. We show the dimple and reservoir atom number (middle) and the temperature TD in the dimple and the temperature TRy in the reservoir along the vertical axis (bottom). Both atom number and temperature in the reservoir remain constant while the dimple loads further atoms, indicating lower losses thanks to the protecting effect of the transparency beam.
