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Chin. Phys. B, 2013, Vol. 22(1): 013301    DOI: 10.1088/1674-1056/22/1/013301
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Stabilizing photoassociated Cs2 molecules by optimal control

Zhang Wei, Xie Ting, Huang Yin, Wang Gao-Ren, Cong Shu-Lin
School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
Abstract  We demonstrate theoretically that photoassociated molecules can be stabilized to deeply bound states. This process is achieved by transferring the population from the outer well to the inner well using optimal control theory, the Cs2 molecule is taken as an example. Numerical calculations show that weakly bound molecules formed in the outer well by a pump pulse can be compressed to the inner well via a vibrational level of the ground electronic state as an intermediary by an additionally optimized laser pulse. The positively chirped pulse can enhance the population of the target state. With a transform-limited dump pulse, nearly all photoassociated molecules in the inner well of the excited electronic state can be transferred to the deeply vibrational level of the ground electronic state.
Keywords:  ultracold molecule      photoassociation      optimal control  
Received:  13 April 2012      Revised:  23 June 2012      Published:  01 December 2012
PACS:  33.80.-b (Photon interactions with molecules)  
  32.80.Qk (Coherent control of atomic interactions with photons)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10974024) and the SRFDP, China (Grant No. 20090041110025).
Corresponding Authors:  Cong Shu-Lin     E-mail:  shlcong@dlut.edu.cn

Cite this article: 

Zhang Wei, Xie Ting, Huang Yin, Wang Gao-Ren, Cong Shu-Lin Stabilizing photoassociated Cs2 molecules by optimal control 2013 Chin. Phys. B 22 013301

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