An Optical Trap for Collisional Studies on Cold Fermionic Potassium

Details An Optical Trap for Collisional Studies on Cold Fermionic Potassium An Optical Trap for Collisional Studies on Cold Fermionic Potassium

2000-10-26

arxiv.org/abs/physics/0010065v1

Phys. Rev. A 63, 052709 (2001)

Physics

Atomic Physics

7 pages, 8 figures, Rev Tex

Scientific paper

10.1103/PhysRevA.63.052709

We report on trapping of fermionic 40K atoms in a red-detuned standing-wave optical trap, loaded from a magneto-optical trap. Typically, 10^6 atoms are loaded at a density of 10^12 cm^-3 and a temperature of 65 microK, and trapped for more than 1 s. The optical trap appears to be the proper environment for performing collisional measurements on the cold atomic sample. In particular we measure the elastic collisional rate by detecting the rethermalization following an intentional parametric heating of the atomic sample. We also measure the inelastic two-body collisional rates for unpolarized atoms in the ground hyperfine states, through detection of trap losses.

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