外文题目: Comparison of different techniques in optical trap for generating picokelvin 3D atom cloud in microgravity
作者: Yao, Hepeng; Luan, Tian; Li, Chen; Zhang, Yin; Ma, Zhaoyuan; Chen, Xuzong
刊名: Opt. Commun.
年: 2016 卷: 359 页： 123--128
英文关键词:
Laser cooling; Optical trap; Picokelvin; Microgravity; TSCBC; DKC
BOSE-EINSTEIN CONDENSATION; COOLING ATOMS; GAS
英文摘要:
Pursuing ultralow temperature 3D atom gas under microgravity conditions is one of the popular topics in the field of ultracold research. Many groups around the world are using, or are planning to use, delta-kick cooling (DKC) in microgravity. Our group has also proposed a two-stage crossed beam cooling (TSCBC) method that also provides a path to picokelvin temperatures. In this paper, we compare the characteristics of TSCBC and DKC for producing a picokelvin system in microgravity. Using a direct simulation Monte Carlo (DSMC) method, we simulate the cooling process of Rb-87 using the two different cooling techniques. Under the same initial conditions, Rb-87 can reach 7 pK in 15 s using TSCBC and 75 pK in 5.1 s with DKC. The simulation results show that TSCBC can reach lower temperatures compared with DKC, but needs more time and a more stable laser. (C) 2015 Elsevier B.V. All rights reserved.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1016/j.optcom.2015.09.065


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