$^6$ Li的量子简并和分子BEC的全光产生
All-Optical Production of quantum degeneracy and molecular BEC of $^6$Li
摘要：
在高功率交叉光偶极阱中，通过直接蒸发冷却，在$^6$ Li的两个最低超精细态的混合物中获得了高度简并和强相互作用的费米气体.该陷阱是从一个大原子数磁光阱（MOT），这是由一个2.5瓦的腔内倍频光输出在671 nm的激光系统实现加载。利用这个系统，我们还演示了分子玻色-爱因斯坦凝聚体（mBEC）的产生，并观察到费米气体在所谓的BEC-BCS交叉制度的各向异性膨胀。
英文摘要：
We achieve a highly degenerate and strongly interacting Fermi gas in a mixture of the two lowest hyperfine states of $^6$Li by direct evaporative cooling in a high power crossed optical dipole trap. The trap is loaded from a large atom number magneto-optical trap (MOT) which is realized by a laser system of 2.5-watts intracavity-frequency-doubled light output at 671 nm. With this system, we also demonstrate the production of a molecular Bose-Einstein condensates (mBEC), and observe the anisotropic expansion of Fermi gases in the so-called BEC-BCS crossover regime.
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