Single Atoms in an Optical Dipole Trap: Towards a Deterministic Source of Cold Atoms

Details Single Atoms in an Optical Dipole Trap: Towards a Deterministic Source of Cold Atoms Single Atoms in an Optical Dipole Trap: Towards a Deterministic Source of Cold Atoms

2000-03-14

arxiv.org/abs/quant-ph/0003052v2

Phys. Rev. Lett. 85, 3777 (2000).

Physics

Quantum Physics

LaTeX 2e, 4 pages, 5 Postscript figures, revised version for publication in PRL. One figure changed for greater clarity

Scientific paper

10.1103/PhysRevLett.85.3777

We describe a simple experimental technique which allows us to store a small and deterministic number of neutral atoms in an optical dipole trap. The desired atom number is prepared in a magneto-optical trap overlapped with a single focused Nd:YAG laser beam. Dipole trap loading efficiency of 100 % and storage times of about one minute have been achieved. We have also prepared atoms in a certain hyperfine state and demonstrated the feasibility of a state-selective detection via resonance fluorescence at the level of a few neutral atoms. A spin relaxation time of the polarized sample of $4.2\pm 0.7$ s has been measured. Possible applications are briefly discussed.

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