THE TEMPERATURE OF ATOMS IN A MAGNETOOPTICAL TRAP

被引：35

作者：

COOPER, CJ

HILLENBRAND, G

RINK, J

TOWNSEND, CG

ZETIE, K

FOOT, CJ

机构：

[1] University of Oxford, Clarendon Laboratory, Oxford

来源：

EUROPHYSICS LETTERS | 1994年 / 28卷 / 06期

关键词：

D O I：

10.1209/0295-5075/28/6/004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A cloud of ultracold atoms confined in a magneto-optical trap (MOT) has a temperature greater than that of a low-density vapour in the same light field. It has been observed (Drewsen M. et al., Appl. Phys. B, 59 (1994) 283) that this temperature excess is proportional to the cube root of the total number of trapped atoms (N1/3). We present an explanation for this effect in terms of the scattering which arises when photons spontaneously emitted by atoms have an appreciable probability of being reabsorbed within the cloud. This hypothesis has been tested by time-of-flight measurements of the temperature of clouds of atoms released from a MOT into 1-dimensional and 3-dimensional optical molasses in the sigma+-sigma- and lin perpendicular-to lin configuration.

引用

页码：397 / 402

页数：6

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