Measurement of the atom number distribution in an optical tweezer using single photon counting

Details Measurement of the atom number distribution in an optical tweezer using single photon counting Measurement of the atom number distribution in an optical tweezer using single photon counting

2010-06-04

arxiv.org/abs/1006.0917v1

Phys. Rev. A 82, 023623 (2010)

Physics

Condensed Matter

Quantum Gases

6 pages, 5 figures

Scientific paper

10.1103/PhysRevA.82.023623

We demonstrate in this paper a method to reconstruct the atom number distribution of a cloud containing a few tens of cold atoms. The atoms are first loaded from a magneto-optical trap into a microscopic optical dipole trap and then released in a resonant light probe where they undergo a Brownian motion and scatter photons. We count the number of photon events detected on an image intensifier. Using the response of our detection system to a single atom as a calibration, we extract the atom number distribution when the trap is loaded with more than one atom. The atom number distribution is found to be compatible with a Poisson distribution.

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