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Atom counting in ultra-cold gases using photoionisation and ion detection

T. Campey·C. J. Vale·M. J. Davis·S. Kraft·C. Zimmermann·J. Fortágh·N. R. Heckenberg·H. Rubinsztein-Dunlop
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Abstract

We analyse photoionisation and ion detection as a means of accurately counting ultra-cold atoms. We show that it is possible to count clouds containing many thousands of atoms with accuracies better than $N^{-1/2}$ with current technology. This allows the direct probing of sub-Poissonian number statistics of atomic samples. The scheme can also be used for efficient single atom detection with high spatio-temporal resolution. All aspects of a realistic detection scheme are considered, and we discuss experimental situations in which such a scheme could be implemented.

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T. Campey, C. J. Vale, M. J. Davis, S. Kraft, C. Zimmermann, J. Fortágh, N. R. Heckenberg, H. Rubinsztein-Dunlop. 2006-07-06. Atom counting in ultra-cold gases using photoionisation and ion detection. https://doi.org/10.1103/physreva.74.043612

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