We report the experimental production of degenerate Fermi gases of ⁶Li atoms in an optical dipole trap. The gray-molasses technique is carried out to decrease the atomic temperature to 57 μK, which facilitates the efficient loading of cold atoms into the optical dipole trap. The Fermi degeneracy is achieved by evaporative cooling of a two-spin mixture of ⁶Li atoms on the Feshbach resonance. The degenerate atom number per spin is 3.5 10⁴, and the reduced temperature T/T _F is as low as 0.1, where T _F is the Fermi temperature of the non-interacting Fermi gas. We also observe the anisotropic expansion of the atom cloud in the strongly interacting regime.

我们报告了光偶极陷阱中^{6 个}锂原子的简并费米气体的实验生产。灰糖蜜技术用于将原子温度降低至 57 μK，这有助于将冷原子有效加载到光偶极陷阱中。费米简并是通过在 Feshbach 共振上蒸发冷却^{6 个}锂原子的双自旋混合物来实现的。每次自旋的简并原子数为 3.5 10 ⁴，还原温度T / T _F低至 0.1，其中T _F是非相互作用费米气体的费米温度。我们还观察到在强相互作用状态下原子云的各向异性膨胀。