Vaidya V D, Tiamsuphat J, Rolston S L, Porto J V
Joint Quantum Institute, University of Maryland and NIST, College Park, Maryland 20742, USA.
Phys Rev A. 2015 Oct;92(4). doi: 10.1103/physreva.92.043604. Epub 2015 Oct 5.
We report the realization of a quantum degenerate mixture of bosonic Rb and fermionic Yb atoms in a hybrid optical dipole trap with a tunable, species-dependent trapping potential. Rb is shown to be a viable refrigerant for the noninteracting Yb atoms, cooling up to 2.4 × 10 Yb atoms to a temperature of = 0.16(2) while simultaneously forming a Rb Bose-Einstein condensate of 3.5 × 10 atoms. Furthermore we demonstrate our ability to independently tailor the potentials for each species, which paves the way for studying impurities immersed in a Bose gas.
我们报告了在具有可调谐、依赖于原子种类的捕获势的混合光学偶极阱中实现玻色子铷（Rb）和费米子镱（Yb）原子的量子简并混合物。结果表明，Rb 是用于非相互作用 Yb 原子的一种可行的制冷剂，可将多达 2.4×10⁴个 Yb 原子冷却至温度 T = 0.16(2) μK，同时形成 3.5×10⁴个原子的 Rb 玻色 - 爱因斯坦凝聚体。此外，我们展示了独立调整每种原子势的能力，这为研究沉浸在玻色气体中的杂质铺平了道路。
