Measurement of the electric polarizability of lithium by atom interferometry

Details Measurement of the electric polarizability of lithium by atom interferometry Measurement of the electric polarizability of lithium by atom interferometry

2005-06-14

arxiv.org/abs/quant-ph/0506106v1

Physics

Quantum Physics

4 pages, 15 June 2005

Scientific paper

10.1103/PhysRevA.73.011603

We have built an atom interferometer and, by applying an electric field on one of the two interfering beams, we have measured the static electric polarizability of lithium with a 0.66 % uncertainty. Our experiment is similar to an experiment done on sodium in 1995 by D. Pritchard and co-workers, with several improvements: the electric field can be calculated analytically and our phase measurements are very accurate. This experiment illustrates the extreme sensitivity of atom interferometry: when the atom enters the electric field, its velocity increases and the fractional change, equal to 4 x 10^(-9) for our largest field, is measured with a 10^(-3) accuracy.

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