Physics – Condensed Matter – Quantum Gases
Scientific paper
2009-12-17
Physics
Condensed Matter
Quantum Gases
4 pages, 6 figures
Scientific paper
10.1103/PhysRevA.81.031402
We report the first experimental realization of ultracold atoms confined in a time-averaged, adiabatic potential (TAAP). This novel trapping technique involves using a slowly oscillating ($\sim$ kHz) bias field to time-average the instantaneous potential given by dressing a bare magnetic potential with a high frequency ($\sim$ MHz) magnetic field. The resultant potentials provide a convenient route to a variety of trapping geometries with tunable parameters. We demonstrate the TAAP trap in a standard time-averaged orbiting potential trap with additional Helmholtz coils for the introduction of the radio frequency dressing field. We have evaporatively cooled 5 $\times 10^4$ atoms of $^{87}$Rb to quantum degeneracy and observed condensate lifetimes of over \unit[3]{s}.-
Foot Christopher J.
Gildemeister M.
Kubasik Marcin
Nugent Eileen
Sheard B. T.
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