BOSE-EINSTEIN CONDENSATION IN A GAS OF SODIUM ATOMS
BOSE-EINSTEIN CONDENSATION IN A GAS OF SODIUM ATOMS
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DOI：
10.1103/physrevlett.75.3969
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发表时间：
1995-11-27
影响因子：
8.6
通讯作者：
KETTERLE, W
中科院分区：
文献类型：
--
作者：
DAVIS, KB;MEWES, MO;KETTERLE, W
我们观察到钠原子的玻色-爱因斯坦凝聚。原子被困在一个新颖的陷阱，利用磁力和光学力。蒸发冷却在7秒内使相空间密度增加了6个数量级。凝聚物含有高达5 × 10（5）个原子，密度超过10（14）cm（-3）。玻色凝聚的引人注目的签名是突然出现的双峰速度分布低于临界温度类似2亩K的分布由各向同性的热分布和椭圆形的核心归因于密集的冷凝物的膨胀。
We have observed Bose-Einstein condensation of sodium atoms. The atoms were trapped in a novel trap that employed both magnetic and optical forces. Evaporative cooling increased the phase-space density by 6 orders of magnitude within seven seconds. Condensates contained up to 5 X 10(5) atoms at densities exceeding 10(14) cm(-3). The striking signature of Bose condensation was the sudden appearance of a bimodal velocity distribution below the critical temperature of similar to 2 mu K The distribution consisted of an isotropic thermal distribution and an elliptical core attributed to the expansion of a dense condensate.