Open AccessTwo-stage crossed beam cooling with ^6Li and ^133Cs atoms in microgravity
Author(s) -
Tian Luan,
Hepeng Yao,
Lu Wang,
Chen Li,
Shaofei Yang,
Xuzong Chen,
Zihan Ma
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.011378
Subject(s) - ultracold atom , atomic physics , physics , degenerate energy levels , fermi gamma ray space telescope , optical lattice , magnetic trap , degeneracy (biology) , dipole , beam (structure) , laser cooling , quantum , fermion , fermi gas , optics , condensed matter physics , plasma , quantum mechanics , superfluidity , laser , bioinformatics , biology , electron
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.