Quasi-universal dipolar scattering in cold and ultracold gases

被引：103

作者：

Bohn, J. L. ^{[1
,2
]}

Cavagnero, M. ^{[3
]}

Ticknor, C. ^{[4
,5
]}

机构：

[1] Univ Colorado, NIST, Joint Inst Lab Astrophys, Boulder, CO 80309 USA

[2] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[3] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

[4] Swinburne Univ Technol, ARC Ctr Excellence Quantum Atom Opt, Hawthorn, Vic 3122, Australia

[5] Swinburne Univ Technol, Ctr Atom Opt & Ultrafast Spect, Hawthorn, Vic 3122, Australia

来源：

NEW JOURNAL OF PHYSICS | 2009年 / 11卷

基金：

美国国家科学基金会;

关键词：

POLAR-MOLECULES; COLLISIONS; PHYSICS; ATOMS; BOSE;

D O I：

10.1088/1367-2630/11/5/055039

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the scattering cross section of aligned dipolar molecules in low-temperature gases. Over a wide range of collision energies relevant to contemporary experiments, the cross section declines in inverse proportion to the collision speed, and is given nearly exactly by a simple semiclassical formula. At yet lower energies, the cross section becomes independent of energy, and is reproduced within the Born approximation to within corrections due to the s-wave scattering length. While these behaviors are universal for all polar molecules, nevertheless interesting deviations from universality are expected to occur in the intermediate energy range.

引用

页数：18