Enhancement of the photoassociation of ultracold atoms via a non-resonant magnetic field Ji-Zhou Wu(

Ji-Zhou Wu; Yu-Qing Li; Wen-Liang Liu; Peng Li; Xiao-Feng Wang; Peng Chen; Jie Ma; Lian-Tuan Xiao; Suo-Tang Jia

doi:10.1088/1674-1056/ab9611

Journals >Chinese Physics B >Volume 29 >Issue 8 >Page > Article

Chinese Physics B
Vol. 29, Issue 8, (2020)

Enhancement of the photoassociation of ultracold atoms via a non-resonant magnetic field Ji-Zhou Wu(

Ji-Zhou Wu^1、2, Yu-Qing Li^1、2、†, Wen-Liang Liu^1、2, Peng Li³, Xiao-Feng Wang¹, Peng Chen¹, Jie Ma^1、2、3, Lian-Tuan Xiao^1、2, and Suo-Tang Jia^1、2

Author Affiliations

¹State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China

²Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

³College of Physics and Electronics Engineering, Shanxi University, Taiyuan 00006, China

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DOI: 10.1088/1674-1056/ab9611 Cite this Article

Ji-Zhou Wu, Yu-Qing Li, Wen-Liang Liu, Peng Li, Xiao-Feng Wang, Peng Chen, Jie Ma, Lian-Tuan Xiao, Suo-Tang Jia. Enhancement of the photoassociation of ultracold atoms via a non-resonant magnetic field Ji-Zhou Wu([J]. Chinese Physics B, 2020, 29(8): Copy Citation Text

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Abstract

We report an effective method for enhancing the photoassociation of ultracold atoms using a non-resonant magnetic field, which enables the manipulation of the coupling between the wavefunctions of the colliding atomic pairs and the excited molecules. A series of photoassociation spectra are measured for different magnetic fields. We show that the photoassociation rate is significantly dependent on the non-resonant magnetic field. A qualitatively theoretical explanation is provided, and shows a good agreement with the experimental result.

Keywords

magnetic field photoassociation ultracold atoms

$$ \begin{eqnarray}{K}_{{\rm{PA}}}=\varGamma \displaystyle \int |\langle \varPsi (\upsilon,J)|{V}_{{\rm{eg}}}|{\varPhi }_{k}\rangle {|}^{2}{\rm{d}}r,\end{eqnarray}$$

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$$ \begin{eqnarray}\begin{array}{l}{\varPhi }_{k}(r) ={\varPhi }_{k,r\gt \bar{a}}(r)+{\varPhi }_{k,r\le \bar{a}}(r)\\ \quad\quad\,\,\, =\sqrt{\displaystyle \frac{2{m}_{{\rm{r}}}}{\pi {\hslash }^{2}k}}\sin (kr+\eta )+A\sin ({k}_{1}r),\end{array}\end{eqnarray}$$

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