Single-atom detection on a chip: from realization to application

Details Single-atom detection on a chip: from realization to application Single-atom detection on a chip: from realization to application

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12f5034s&link_type=abstract

New Journal of Physics, Volume 12, Issue 6, pp. 065034 (2010).

Physics

2

Scientific paper

In this paper, we describe the preparation and detection of ultracold atoms on a microchip with single-atom sensitivity. The detection scheme is based on multi-photon ionization of atoms and the subsequent guiding of the generated ions by ion optics to a channel electron multiplier. We resolve single atoms with a detection efficiency above 60%. The detector is suitable for real-time observations of static and dynamic processes in ultracold quantum gases. Although the ionization is destructive, sampling a small subset of the atomic distribution is sufficient for the determination of the desired information. We take full high-resolution spectra of ultracold atoms by ionizing only 5% of the atoms. Using an additional microwave near 6.8 GHz, the detection scheme becomes energy, position and state selective. This can be used for in situ determination of the energy distribution and temperature of atom clouds inside the trap and applied for future correlation measurements.

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