Cooling Bose-Einstein condensates below 500 picokelvin

被引：189

作者：

Leanhardt, AE

Pasquini, TA

Saba, M

Schirotzek, A

Shin, Y

Kielpinski, D

Pritchard, DE

Ketterle, W

机构：

[1] MIT, MIT Harvard Ctr Ultracold Atoms, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA

来源：

SCIENCE | 2003年 / 301卷 / 5639期

关键词：

D O I：

10.1126/science.1088827

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Spin-polarized gaseous Bose-Einstein condensates were confined by a combination of gravitational and magnetic forces. The partially condensed atomic vapors were adiabatically decompressed by weakening the gravito-magnetic trap to a mean frequency of 1 hertz, then evaporatively reduced in size to 2500 atoms. This lowered the peak condensate density to 5 x 10(10) atoms per cubic centimeter and cooled the entire cloud in all three dimensions to a kinetic temperature of 450 +/- 80 picokelvin. Such spin-polarized, dilute, and ultracold gases are important for spectroscopy, metrology, and atom optics.

引用

页码：1513 / 1515

页数：3

共 28 条

[1] REFLECTION OF THERMAL CS ATOMS GRAZING A POLISHED GLASS-SURFACE [J].