Scattering of ultracold atoms by an absorbing nanowire

Autor:	Martin Fink, Harald Friedrich, Johannes Eiglsperger, Javier Madroñero
Rok vydání:	2011
Předmět:	Physics Ultracold atom Scattering Optical physics Semiclassical physics Scattering length Radius Boundary value problem Atomic physics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Absorption (electromagnetic radiation) Atomic and Molecular Physics and Optics
Zdroj:	The European Physical Journal D. 63:33-39
ISSN:	1434-6079 1434-6060
Popis:	We study the scattering of ultracold atoms by a conducting cylindrical wire with total absorption near the surface of the wire. A hierarchy of approximations for the exact nonretarded atom-wire potential is explored. We show the existence of a semiclassical region near to the surface of the wire, which allows us to unambiguously define incoming boundary conditions for the description of total absorption at the wire surface. The semiclassical region is only reproduced by an accurate treatment of the potential. We calculate the complex s-wave scattering length for the effective two-dimensional atom-wire scattering problem. The scattering length tends to the wire radius R in the thick-wire limit, and it tends to 0 nearly as (ln R)-1 in the thin-wire limit.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::654dc539d2085f3ad5fd0a5b9c103194 https://doi.org/10.1140/epjd/e2011-10659-5 Zobrazit plný text záznamu Plný text ve formátu PDF