The micromotion of a Rb Bose-Einstein condensate in a triaxial time-orbiting-potential (TOP) trap was experimentally examined. The effects of the micromotion in the time-varying effective potential of the trap were detected in two experiments. In one experiment, the TOP trap was switched off at a well-defined phase of the bias field rotating in the horizontal plane and the position of the atoms was detected after a few milliseconds of free fall. In the other experiment, the center-of-mass oscillations of the condensate were excited along the vertical z-axis and the center of the oscillations was measured for the clockwise and counterclockwise rotations of the bias field. The findings were compared with a theoretical model and numerical simulations.
Micromotion of a Bose-Einstein-condensate in a dynamic trap
CIAMPINI, DONATELLA;ARIMONDO, ENNIO
2000-01-01
Abstract
The micromotion of a Rb Bose-Einstein condensate in a triaxial time-orbiting-potential (TOP) trap was experimentally examined. The effects of the micromotion in the time-varying effective potential of the trap were detected in two experiments. In one experiment, the TOP trap was switched off at a well-defined phase of the bias field rotating in the horizontal plane and the position of the atoms was detected after a few milliseconds of free fall. In the other experiment, the center-of-mass oscillations of the condensate were excited along the vertical z-axis and the center of the oscillations was measured for the clockwise and counterclockwise rotations of the bias field. The findings were compared with a theoretical model and numerical simulations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
