Evaporative cooling of an atomic beam

被引：60

作者：

Mandonnet, E

Minguzzi, A

Dum, R

Carusotto, I

Castin, Y

Dalibard, J

机构：

[1] Lab Kastler Brossel, F-75005 Paris, France

[2] Scuola Nornake Super, INFM, I-56126 Pisa, Italy

来源：

EUROPEAN PHYSICAL JOURNAL D | 2000年 / 10卷 / 01期

关键词：

D O I：

10.1007/s100530050521

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a theoretical analysis of the evaporative cooling of an atomic beam propagating in a magnetic guide. Cooling is provided by transverse evaporation. The atomic dynamics inside the guide is analyzed by solving the Boltzmann equation with two different approaches: an approximate analytical ansatz and a Monte-Carlo simulation. Within their domain of validity, these two methods are found to be in very good agreement with each other. They allow us to determine how the phase-space density and the flux of the beam vary along its direction of propagation. We find a significant increase for the phase-space density along the guide for realistic experimental parameters. By extrapolation, we estimate the length of the beam needed to reach quantum degeneracy.

引用

页码：9 / 18

页数：10

共 29 条

[1] Macroscopic quantum interference from atomic tunnel arrays [J].