title: Two-stage crossed beam cooling with ⁶Li and ¹³³Cs atoms in microgravity.
abstract: Applying the direct simulation Monte Carlo (DSMC) method developed for ultracold Bose-Fermi mixture gases research, we study the sympathetic cooling process of 6Li and 133Cs atoms in a crossed optical dipole trap. The obstacles to producing 6Li Fermi degenerate gas via direct sympathetic cooling with 133Cs are also analyzed, by which we find that the side-effect of the gravity is one of the main obstacles. Based on the dynamic nature of 6Li and 133Cs atoms, we suggest a two-stage cooling process with two pairs of crossed beams in microgravity environment. According to our simulations, the temperature of 6Li atoms can be cooled to T = 29.5 pK and T/TF = 0.59 with several thousand atoms, which propose a novel way to get ultracold fermion atoms with quantum degeneracy near pico-Kelvin.
authors.forename: Tian
authors.initials: T
authors.lastname: Luan
authors.forename: Hepeng
authors.initials: H
authors.lastname: Yao
authors.forename: Lu
authors.initials: L
authors.lastname: Wang
authors.forename: Chen
authors.initials: C
authors.lastname: Li
authors.forename: Shifeng
authors.initials: S
authors.lastname: Yang
authors.forename: Xuzong
authors.initials: X
authors.lastname: Chen
authors.forename: Zhaoyuan
authors.initials: Z
authors.lastname: Ma