Experimental Observation of Spin-Exchange in Ultracold Fermi Gases
Peng Peng1,2 , Liang-Hui Huang1,2** , Dong-Hao Li1,2 , Zeng-Ming Meng1,2 , Peng-Jun Wang1,2 , Jing Zhang1**
1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-electronics, Shanxi University, Taiyuan 0300062 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006
Abstract ：We experimentally study the spin exchange collision in ultracold $^{40}$K Fermi gases. The quadratic Zeeman shift, trap potential and temperature of atomic cloud will influence on the spin changing dynamics. Dependences of the spin components populations on the external bias magnetic field, the optical trap depth and the temperature of atomic cloud are experimentally investigated. The spin exchange from the initial states to the final state are observed for different initial states. This work shows an interesting process of reaching equilibrium by redistribution among the spin states with the spin exchange collision in an ultracold large-spin Fermi gas.
收稿日期: 2017-11-06
出版日期: 2018-02-25
:
34.20.Cf
(Interatomic potentials and forces)
67.85.Hj
(Bose-Einstein condensates in optical potentials)
03.75.Lm
(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
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2018, Vol. 35 
