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)
[1] Bloch I, Dalibard J and Zwerger W 2008 Rev. Mod. Phys. 80 885 [2] Chin C, Grimm R, Julienne P and Tiesinga E 2010 Rev. Mod. Phys. 82 1225 [3] Stamper-Kurn D M and Ueda M 2013 Rev. Mod. Phys. 85 1191 [4] Black A T, Gomez E, Turner L D, Jung S and Let P D 2007 Phys. Rev. Lett. 99 070403 [5] Weiner J, Bagnato V S, Zilio S and Julienne P S 1999 Rev. Mod. Phys. 71 463 [6] Estève J, Gross C, Weller A, Giovanazzi S and Oberthaler M K 2008 Nature 455 1216 [7] Gross C, Zibold T, Nicklas E, Estève J and Oberthaler M K 2010 Nature 464 1165 [8] Riedel M F, Böhi P, Li Y, Hänsch T W, Sinatra A and Treutlein P 2010 Nature 464 1170 [9] Gross C, Strobel H, Nicklas E, Zibold T, Bar-Gill N, Kurizki G and Oberthaler M K 2011 Nature 480 219 [10] Zhang Z and Duan L M 2013 Phys. Rev. Lett. 111 180401 [11] Luo X Y, Zou Y Q, Wu L N, Liu Q, Han M F, Tey M K and You L 2017 Science 355 620 [12] Pechkis H K, Wrubel J P, Schwettmann A, Griffin P F, Barnett R, Tiesinga E and Lett P D 2013 Phys. Rev. Lett. 111 025301 [13] Widera A, Gerbier F, Foelling S, Gericke T, Mandel O and Bloch I 2005 Phys. Rev. Lett. 95 190405 [14] Struck J, Ölschlager C, Le Targat R, Soltan-Panahi P, Eckardt A, Lewenstein M, Windpassinger P and Sengstock K 2011 Science 333 996 [15] Simon J, Bakr W S, Ma R, Eric Tai M, Preiss P M and Greiner M 2011 Nature 472 307 [16] Krauser J S, Heinze J, Fläschner N, Götze S, Jürgensen O, Lühmann D S, Becker C and Sengstock K 2012 Nat. Phys. 8 813 [17] Krauser J S, Ebling U, Fläschner N, Heinze J, Sengstock K, Lewenstein M, Eckardt A and Becker C 2014 Science 343 157 [18] Ebling U, Krauser J S, Fläschner N, Sengstock K, Becker C, Lewenstein M and Eckardt A 2014 Phys. Rev. X 4 021011 [19] Dong Y and Pu H 2013 Phys. Rev. A 87 043610 [20] Wei D, Xiong D Z, Chen H X and Zhang J 2007 Chin. Phys. Lett. 24 679 [21] Wei D, Xiong D Z, Chen H X, Wang P J, Guo L and Zhang J 2007 Chin. Phys. Lett. 24 1541 [22] Xiong D Z, Chen H X, Wang P J, Yu X D, Gao F and Zhang J 2008 Chin. Phys. Lett. 25 843 [23] Chai S J, Wang P J, Fu Z K, Huang L H and Zhang J 2012 Acta Sin. Quantum Opt. 18 171 [24] Huang L H, Meng Z M, Wang P J, Peng P, Zhang S L, Chen L C, Li D H, Zhou Q and Zhang J 2016 Nat. Phys. 12 540
[1]
. [J]. 中国物理快报, 2020, 37(12): 123201-.
[2]
. [J]. 中国物理快报, 2016, 33(03): 33401-033401.
[3]
. [J]. 中国物理快报, 2015, 32(08): 80501-080501.
[4]
. [J]. 中国物理快报, 2013, 30(11): 113402-113402.
[5]
. [J]. 中国物理快报, 2013, 30(9): 96106-096106.
[6]
. [J]. Chin. Phys. Lett., 2013, 30(2): 23401-023401.
[7]
ZHANG Ji-Cai**;ZHU Zun-Lue;LIU Yu-Fang;SUN Jin-Feng;
. Elastic Scattering Properties of Ultracold Strontium Atoms [J]. 中国物理快报, 2011, 28(12): 123401-123401.
[8]
YUAN Xiao-Jian;**;CHEN Nan-Xian;SHEN Jiang
. Lattice-Inversion Embedded-Atom-Method Interatomic Potentials for Group-VA Transition Metals [J]. 中国物理快报, 2011, 28(12): 123402-123402.
[9]
Jamieson M. J.**;Ouerdane H.;
. Parameters for Cold Collisions of Lithium and Caesium Atoms [J]. 中国物理快报, 2011, 28(6): 60308-060308.
[10]
HU Qiu-Bo;ZHANG Yong-Sheng;SUN Jin-Feng;YU Ke
. Elastic Scattering between Ultracold 23 Na and 85 Rb Atoms in the Triplet State [J]. 中国物理快报, 2011, 28(4): 43201-043201.
[11]
O. Bayrak**;A. Soylu;I. Boztosun
. Effect of the Velocity-Dependent Potentials on the Bound State Energy Eigenvalues [J]. 中国物理快报, 2011, 28(4): 40304-040304.
[12]
HU Qiu-Bo;ZHANG Yong-Sheng;SUN Jin-Feng. Elastic Scattering of Ultracold 23Na and 39K Atoms in the Singlet State [J]. 中国物理快报, 2010, 27(2): 23202-023202.
[13]
CHEN Yi;SHEN Jiang;CHEN Nan-Xian. Structural and Thermodynamic Properties of M3 W3 N (M=Fe, Co, Ni) [J]. 中国物理快报, 2009, 26(4): 48101-048101.
[14]
LIU Xiao-Ming;LIU Zhan-Li;YOU Xiao-Chuan;NIE Jun-Feng;ZHUANG Zhuo. Theoretical Strength of Face-Centred-Cubic Single Crystal Copper Based on a Continuum Model [J]. 中国物理快报, 2009, 26(2): 26103-206103.
[15]
DU Bing-Ge;SUN Jin-Feng;ZHANG Ji-Cai;ZHANG Ying;LI Wei;ZHU Zun-Lue. Variable Phase Method Used to Calculate Ultracold Scattering Properties of 7 Li33 Cs [J]. 中国物理快报, 2008, 25(10): 3639-3642.