论文标题
欧洲欧洲
Bose-Einstein Condensation of Europium
论文作者
论文摘要
We report the realization of a Bose-Einstein condensate of europium atoms, which is a strongly dipolar species with unique properties, a highly symmetric $[\mathrm{Xe}]\ 4f^7 6s^2\ {}^8\mathrm{S}_{7/2}$ electronic ground state and a hyperfine structure.通过在交叉的光学偶极陷阱中蒸发冷却，我们产生了$ {}^{151} $ eu的冷凝物，其中包含$ 5 \ times 10^4 $原子。 $ {}^{151} $ eu的散射长度估计为$ a_s = 110（4）\，a_ \ mathrm {b} $，通过比较与原子磁矩不同方向扩展冷凝物的速度。我们在Feshbach共振附近观察到凝管的变形为$ 1.32 \，\ Mathrm {G} $，宽度为$ 10 \，\ Mathrm {mg} $。
We report the realization of a Bose-Einstein condensate of europium atoms, which is a strongly dipolar species with unique properties, a highly symmetric $[\mathrm{Xe}]\ 4f^7 6s^2\ {}^8\mathrm{S}_{7/2}$ electronic ground state and a hyperfine structure. By means of evaporative cooling in a crossed optical dipole trap, we produced a condensate of ${}^{151}$Eu containing up to $5\times 10^4$ atoms. The scattering length of ${}^{151}$Eu was estimated to be $a_s = 110(4)\, a_\mathrm{B}$ by comparing the velocities of expansion of condensates with different orientations of the atomic magnetic moments. We observed deformation of the condensate in the vicinity of the Feshbach resonance at $1.32\,\mathrm{G}$ with a width of $10\,\mathrm{mG}$.
