Phys. Rev. Lett. 74, 3577–3580 (1995)Evaporative Cooling in a Crossed Dipole TrapReceived 17 November 1994; published in the issue dated 1 May 1995 Laser cooled sodium atoms are trapped in an optical dipole force trap formed by the intersection of two 1.06 μm laser beams. Densities as high as 4×1012 atoms/cm3 at a temperature of ∼140 μK have been obtained in a ∼900 μK deep trap. By reducing the trap depth over a 2 s interval, we have evaporatively cooled the atoms to a final temperature of ∼4 μK at a density of 6×1011 atoms/cm3. This corresponds to a factor of 28 increase in atomic phase-space density. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.74.3577
DOI:
10.1103/PhysRevLett.74.3577
PACS:
32.80.Pj
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