Production of 87Rb Bose-Einstein Condensate in an Asymmetric Crossed Optical Dipole Trap

2021 ◽  
Vol 38 (10) ◽  
pp. 103701
Author(s):  
Zhu Ma ◽  
Chengyin Han ◽  
Xunda Jiang ◽  
Ruihuan Fang ◽  
Yuxiang Qiu ◽  
...  

We report the production of 87Rb Bose–Einstein condensate in an asymmetric crossed optical dipole trap (ACODT) without the need of an additional dimple laser. In our experiment, the ACODT is formed by two laser beams with different radii to achieve efficient capture and rapid evaporation of laser cooled atoms. Compared to the cooling procedure in a magnetic trap, the atoms are firstly laser cooled and then directly loaded into an ACODT without the pre-evaporative cooling process. In order to determine the optimal parameters for evaporation cooling, we optimize the power ratio of the two beams and the evaporation time to maximize the final atom number left in the ACODT. By loading about 6 × 105 laser cooled atoms in the ACODT, we obtain a pure Bose–Einstein condensate with about 1.4 × 104 atoms after 19 s evaporation. Additionally, we demonstrate that the fringe-type noises in optical density distributions can be reduced via principal component analysis, which correspondingly improves the reliability of temperature measurement.

2020 ◽  
Vol 102 (2) ◽  
Author(s):  
Haruka Otoishi ◽  
Shu Nagata ◽  
Takumi Yukawa ◽  
Kazuya Yamashita ◽  
Toshiya Kinoshita

2010 ◽  
Vol 8 (7) ◽  
pp. 627-629 ◽  
Author(s):  
熊德智 Dezhi Xiong ◽  
王鹏军 Pengjun Wang ◽  
付正坤 Zhengkun Fu ◽  
柴世杰 Shijie Chai ◽  
张靖 Jing Zhang

2003 ◽  
Vol 5 (2) ◽  
pp. S155-S163 ◽  
Author(s):  
Yves Colombe ◽  
Demascoth Kadio ◽  
Maxim Olshanii ◽  
Brigitte Mercier ◽  
Vincent Lorent ◽  
...  

2021 ◽  
Vol 126 (15) ◽  
Author(s):  
M. B. Christensen ◽  
T. Vibel ◽  
A. J. Hilliard ◽  
M. B. Kruk ◽  
K. Pawłowski ◽  
...  

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Huan-Bo Luo ◽  
Lu Li ◽  
Wu-Ming Liu

AbstractWe propose a new scheme for creating three-dimensional Skyrmions in a ferromagnetic spin-1 Bose-Einstein condensate by manipulating a multipole magnetic field and a pair of counter-propagating laser beams. The result shows that a three-dimensional Skyrmion with topological number Q = 2 can be created by a sextupole magnetic field and the laser beams. Meanwhile, the vortex ring and knot structure in the Skyrmion are found. The topological number can be calculated analytically in our model, which implies that the method can be extended to create Skyrmions with arbitrary topological number. As the examples, three-dimensional Skyrmions with Q = 3, 4 are also demonstrated and are distinguishable by the density distributions with a specific quantization axis. These topological objects have the potential to be realized in ferromagnetic spin-1 Bose-Einstein condensates experimentally.


2019 ◽  
Vol 122 (16) ◽  
Author(s):  
M. A. Kristensen ◽  
M. B. Christensen ◽  
M. Gajdacz ◽  
M. Iglicki ◽  
K. Pawłowski ◽  
...  

2006 ◽  
Vol 77 (2) ◽  
pp. 023106 ◽  
Author(s):  
Erik W. Streed ◽  
Ananth P. Chikkatur ◽  
Todd L. Gustavson ◽  
Micah Boyd ◽  
Yoshio Torii ◽  
...  

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