A compact experimental machine for studying tunable Bose-Bose superfluid mixtures
A compact experimental machine for studying tunable Bose-Bose superfluid mixtures
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DOI：
10.1088/1612-202x/ab00fb
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发表时间：
2019-03-01
影响因子：
1.7
通讯作者：
Bagnato, V. S.
中科院分区：
文献类型：
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作者：
Castilho, P. C. M.;Pedrozo-Penafiel, E.;Bagnato, V. S.
我们提出了一个紧凑的和多功能的实验系统，用于生产玻色-玻色超流体混合物的钠和钾原子。这种紧凑的设计结合了超冷原子实验所需的超高真空环境和有效的原子通量，通过使用二维磁光阱作为独立的原子源。我们通过产生具有类似于1 × 10（6）个原子的Na-23的玻色-爱因斯坦凝聚来展示这种新机器的性能。Na-K玻色子混合物的可调谐性对于涡旋和量子湍流的成核研究特别有趣。在这个方向上，科学室沿着垂直方向的大的光学通路提供了实现高分辨率光学设置的条件，该高分辨率光学设置用于利用搅拌光束对冷凝物进行成像和旋转。我们显示了在Na-23 BEC中具有多达14个涡旋的涡旋晶格的成核，证明了实验装置在研究涡旋动力学方面的效率。
We present a compact and versatile experimental system for producing Bose-Bose superfluid mixtures composed of sodium and potassium atoms. The compact design combines the necessary ultra-high vacuum enviroment for ultracold atom experiments with efficient atomic fluxes by using two-dimensional magneto-optical traps as independent source of atoms. We demonstrate the performance of this new machine by producing a Bose-Einstein condensate of Na-23 with similar to 1 x 10(6) atoms. The tunability of Na-K bosonic mixtures is particularly interesting for studies regarding the nucleation of vortices and quantum turbulence. In this direction, the large optical access of the science chamber along the vertical direction provides the conditions to implement high resolution optical setups for imaging and rotating the condensate with a stirring beam. We show the nucleation of a vortex lattice with up to 14 vortices in the Na-23 BEC, attesting the efficiency of the experimental apparatus in studying the dynamics of vortices.