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Chin. Phys. B, 2022, Vol. 31(10): 103401    DOI: 10.1088/1674-1056/ac873c
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Experimental realization of two-dimensional single-layer ultracold gases of 87Rb in an accordion lattice

Liangwei Wang(王良伟)1,2, Kai Wen(文凯)1,2, Fangde Liu(刘方德)1,2, Yunda Li(李云达)1,2, Pengjun Wang(王鹏军)1,2, Lianghui Huang(黄良辉)1,2, Liangchao Chen(陈良超)1,2, Wei Han(韩伟)1,2, Zengming Meng(孟增明)1,2,†, and Jing Zhang(张靖)1,2,‡
1. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-electronics, Shanxi University, Taiyuan 030006, China;
2. Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
Abstract  We experimentally realize two-dimensional (2D) single-layer ultracold gases of 87Rb by dynamically tuning the periodicity of a standing wave, known as accordion lattice. In order to load 87Rb Bose—Einstein condensate into single dark fringe node of the blue detuning optical lattice, we reduce the lattice periodicity from 26.7 μ to 3.5 μ with the help of an acousto-optic deflector (AOD) to compress the three-dimensional BEC adiabatically into a flat and uniform quasi-2D single-layer. We describe the experimental procedure of the atoms loading into the accordion lattice in detail and present the characteristics of the quasi-2D ultracold gases. This setup provides an important platform for studying in- and out-of equilibrium physics, phase transition and 2D topological matter.
Keywords:  two-dimensional ultracold gases      accordion lattice      anisotropy  
Received:  16 June 2022      Revised:  25 July 2022      Accepted manuscript online: 
PACS:  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)  
  32.10.Dk (Electric and magnetic moments, polarizabilities)  
Fund: Project supported by the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0302003), the National Key Research and Development Program of China (Grant Nos. 2016YFA0301602, 2018YFA0307601, and 2021YFA1401700), the National Natural Science Foundation of China (Grant Nos. 12034011, 92065108, 11974224, 12022406, and 12004229), the Natural Science Basic Research Plan of Shaanxi Province, China (Grant No. 2019JQ- 058), and the Fund for Shanxi “1331 Project” Key Subjects Construction.
Corresponding Authors:  Zengming Meng, Jing Zhang     E-mail:  zmmeng01@sxu.edn.cn;jzhang74@sxu.edu.cn

Cite this article: 

Liangwei Wang(王良伟), Kai Wen(文凯), Fangde Liu(刘方德), Yunda Li(李云达), Pengjun Wang(王鹏军), Lianghui Huang(黄良辉), Liangchao Chen(陈良超), Wei Han(韩伟), Zengming Meng(孟增明), and Jing Zhang(张靖) Experimental realization of two-dimensional single-layer ultracold gases of 87Rb in an accordion lattice 2022 Chin. Phys. B 31 103401

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