Abstract

We demonstrate that for ultracold, optically trapped Cs atoms the photoassociation (PA) can be manipulated by using external uniform magnetic fields due to the alteration of the scattering wavefunction in the region of the free–bound optical transition. We present PA–induced atom loss measurements with the same intensity for PA laser but different external magnetic fields, and analyze main contributions of the PA to the variation of the number of atoms in the trap. The PA rate exhibits a strong dependence on the changing uniform magnetic field. The experimental data are simulated within the model of a single–channel one–well rectangular potential, whose depth is adjusted so as to assure the predicted variation of the scattering length with the magnetic field. The computational and experimental results are in a reasonable agreement to each other. The same model is used to illustrate some general properties of the two–body quantum system in the near–threshold state.

Details

Title
Manipulation of photoassociation of ultracold Cs atoms with tunable scattering length by external magnetic fields
Author
Feng, Guosheng 1 ; Li, Yuqing 2 ; Wang, Xiaofeng 1 ; Wu, Jizhou 2 ; Sovkov, Vladimir B 3   VIAFID ORCID Logo  ; Ma, Jie 2 ; Xiao, Liantuan 2 ; Jia, Suotang 2 

1  State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser spectroscopy, College of Physics and Electronics Engineering, Shanxi University, Taiyuan, P. R. China 
2  State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser spectroscopy, College of Physics and Electronics Engineering, Shanxi University, Taiyuan, P. R. China; Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, P.R. China 
3  State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser spectroscopy, College of Physics and Electronics Engineering, Shanxi University, Taiyuan, P. R. China; St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, Russia 
Pages
1-8
Publication year
2017
Publication date
Oct 2017
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41598-017-13534-6
ProQuest document ID
2123043025
Copyright
© 2017. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.