Bose-Einstein condensation in a stiff TOP trap with adjustable geometry
We report on the realization of a stiff magnetic trap with independently adjustable trap frequencies, ω-z$/ and ω-r$/ in the axial and radial directions, respectively. This has been achieved by applying an axial modulation to a time-averaged orbiting potential (TOP) trap. The frequency ratio of the...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
IOP
2000
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| Summary: | We report on the realization of a stiff magnetic trap with independently adjustable trap frequencies, ω-z$/ and ω-r$/ in the axial and radial directions, respectively. This has been achieved by applying an axial modulation to a time-averaged orbiting potential (TOP) trap. The frequency ratio of the trap, ω-z$//ω-r$/, can be decreased continuously from the original TOP trap value of 2.83 down to 1.6. We have transferred a Bose-Einstein condensate (BEC) into this trap and obtained very good agreement between its observed anisotropic expansion and the hydrodynamic predictions. Our method can be extended to obtain a spherical trapping potential, which has a geometry of particular theoretical interest. |
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