Loading and compressing Cs atoms in a very far-off-resonant light trap
2001; American Physical Society; Volume: 63; Issue: 2 Linguagem: Inglês
10.1103/physreva.63.023405
ISSN1538-4446
AutoresD. J. Han, Marshall T. DePue, David S. Weiss,
Tópico(s)Orbital Angular Momentum in Optics
ResumoWe describe an experiment in which $3\ifmmode\times\else\texttimes\fi{}{10}^{7} \mathrm{Cs}$ atoms are loaded into a $400 \ensuremath{\mu}\mathrm{m}$ crossed beam far-off-resonant trap (FORT) that is only $2 \ensuremath{\mu}\mathrm{K}$ deep. A high-density sample is prepared in a magneto-optic trap, cooled in a three-dimensional far-off-resonant lattice (FORL), optically pumped into the lowest-energy state, adiabatically released from the FORL, magnetically levitated, and transferred to the final trap with a phase-space density of ${10}^{\ensuremath{-}3}.$ Spontaneous emission in the FORT is negligible, and we have compressed the atoms in the FORT to a spatial density of $2\ifmmode\times\else\texttimes\fi{}{10}^{13} {\mathrm{a}\mathrm{t}\mathrm{o}\mathrm{m}\mathrm{s}/\mathrm{c}\mathrm{m}}^{3}.$ Evaporative cooling under these conditions proceeds rapidly.
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