Efficient all-optical production of large 6Li quantum gases using D1 gray-molasses cooling
Efficient all-optical production of large 6Li quantum gases using D1 gray-molasses cooling
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DOI：
10.1103/physreva.90.043408
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发表时间：
2014-10-08
影响因子：
2.9
通讯作者：
Roati, G.
中科院分区：
文献类型：
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作者：
Burchianti, A.;Valtolina, G.;Roati, G.
我们利用灰色糖蜜对D-1原子跃迁进行操作，产生了含有大量原子的Li-6简并量子气体。这个亚多普勒冷却阶段使我们可以在2毫秒内将10(9)个原子的初始温度从500µK降低到40µK。我们观察到，D-1冷却仍然有效地进入高强度红外偶极子陷阱，在那里两态混合物被蒸发到简并区域。我们产生了高达5×10(5)分子的分子玻色-爱因斯坦凝聚体和7×10(5)原子的弱相互作用简并费米气体，T/T-F<；0.1，典型的实验占空比为11 S。
We use a gray molasses operating on the D-1 atomic transition to produce degenerate quantum gases of Li-6 with a large number of atoms. This sub-Doppler cooling phase allows us to lower the initial temperature of 10(9) atoms from 500 to 40 mu K in 2 ms. We observe that D-1 cooling remains effective into a high-intensity infrared dipole trap where two-state mixtures are evaporated to reach the degenerate regime. We produce molecular Bose-Einstein condensates of up to 5 x 10(5) molecules and weakly interacting degenerate Fermi gases of 7 x 10(5) atoms at T/T-F < 0.1 with a typical experimental duty cycle of 11 s.