Multiple scattering of matter waves: an analytic model of the refractive index for atomic and molecular gases

Details Multiple scattering of matter waves: an analytic model of the refractive index for atomic and molecular gases Multiple scattering of matter waves: an analytic model of the refractive index for atomic and molecular gases

2010-03-03

arxiv.org/abs/1003.0854v2

Phys. Rev. A 82, 022711 (2010)

Physics

Atomic Physics

5 pages, 1 figure, 2 tables

Scientific paper

10.1103/PhysRevA.82.022711

We present an analytic model of the refractive index for matter waves propagating through atomic or molecular gases. The model, which combines a WKB treatment of the long range attraction with the Fraunhofer model treatment of the short range repulsion, furnishes a refractive index in compelling agreement with recent experiments of Jacquey et al. [Phys. Rev. Lett. 98, 240405 (2007)] on Li atom matter waves passing through dilute noble gases. We show that the diffractive contribution, which arises from scattering by a two dimensional "hard core" of the potential, is essential for obtaining a correct imaginary part of the refractive index.

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