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


Author(s): Lemeshko, Mikhail P; Friedrich, Břetislav
Article Title: Multiple scattering of matter waves: An analytic model of the refractive index for atomic and molecular gases
Affiliation
Abstract: We present an analytic model of the refractive index for matter waves propagating through atomic or molecular gases. The model, which combines the Wentzel-Kramers-Brillouin (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 [Phys. Rev. Lett.PRLTAO0031-900710.1103/PhysRevLett.98.240405 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.
Keywords: Analytic models; Brillouin; Fraunhofer; Hard cores; Imaginary parts; Li atoms; Matter waves; Molecular gas; Noble gas; Short-range repulsion
Journal Title: Physical Review A - Atomic, Molecular, and Optical Physics
Volume: 82
Issue 2
ISSN: 1094-1622
Publisher: American Physical Society  
Date Published: 2010-08-18
Start Page: Article number: 022711
URL:
DOI: 10.1103/PhysRevA.82.022711
Open access: yes (repository)