Atomic time-of-arrival measurements with a laser of finite beam width

Details Atomic time-of-arrival measurements with a laser of finite beam width Atomic time-of-arrival measurements with a laser of finite beam width

2003-02-28

arxiv.org/abs/quant-ph/0302201v1

Physics

Quantum Physics

7 figures

Scientific paper

10.1088/0953-4075/36/12/320

A natural approach to measure the time of arrival of an atom at a spatial region is to illuminate this region with a laser and detect the first fluorescence photons produced by the excitation of the atom and subsequent decay. We investigate the actual physical content of such a measurement in terms of atomic dynamical variables, taking into account the finite width of the laser beam. Different operation regimes are identified, in particular the ones in which the quantum current density may be obtained.

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