Two-stage crossed beam cooling with ^6Li and ^133Cs atoms in microgravity | Zendy

Tian Luan | Zendy; Hepeng Yao | Zendy; Lu Wang | Zendy; Chen Li | Zendy; Shifeng Yang | Zendy; Xuzong Chen | Zendy; Zhaoyuan Ma | Zendy

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Two-stage crossed beam cooling with ^6Li and ^133Cs atoms in microgravity

Author(s) -

Tian Luan,

Hepeng Yao,

Lu Wang,

Chen Li,

Shifeng Yang,

Xuzong Chen,

Zhaoyuan 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 , dipole , degeneracy (biology) , quantum , beam (structure) , fermion , laser cooling , fermi gas , optics , condensed matter physics , plasma , quantum mechanics , electron , superfluidity , bioinformatics , laser , biology

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.

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