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Chin. Phys. B, 2014, Vol. 23(4): 040306    DOI: 10.1088/1674-1056/23/4/040306
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Instability, adiabaticity, and controlling effects of external fields for the dark state in a homonuclear atom–tetramer conversion system

Meng Shao-Yinga, Chen Xi-Haoa, Wu Weia, Fu Li-Binb c
a Department of Physics, Liaoning University, Shenyang 110036, China;
b Science and Technology Computation Physics Laboratory, Institute of AppliedPhysics and Computational Mathematics, Beijing 100088, China;
c Center for Applied Physics and Technology, Peking University, Beijing 100871, China
Abstract  In the present paper, we investigate the instability, adiabaticity, and controlling effects of external fields for a dark state in a homonuclear atom-tetramer conversion that is implemented by a generalized stimulated Raman adiabatic passage. We analytically obtain the regions for the appearance of dynamical instability and study the adiabatic evolution by a newly defined adiabatic fidelity. Moreover, the effects of the external field parameters and the spontaneous emissions on the conversion efficiency are also investigated.
Keywords:  dynamical instability      adiabatic fidelity      dark state      atom-molecule conversion  
Received:  17 April 2013      Revised:  28 August 2013      Accepted manuscript online: 
PACS:  03.75.Mn (Multicomponent condensates; spinor condensates)  
  03.75.Nt (Other Bose-Einstein condensation phenomena)  
  03.75.Kk (Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11005055, 11075020, and 11204117), the National Fundamental Research Programme of China (Grant No. 2011CB921503), the Ph. D. Programs Foundation of Liaoning Provincial Science and Technology Bureau (Grant No. 201103778), and the Higher School Excellent Researcher Award Program from the Educational Department of Liaoning Province of China (Grant No. LJQ2011005).
Corresponding Authors:  Chen Xi-Hao, Fu Li-Bin     E-mail:  xi-haochen@163.com;lbfu@iapcm.ac.cn
About author:  03.75.Mn; 03.75.Nt; 03.75.Kk

Cite this article: 

Meng Shao-Ying, Chen Xi-Hao, Wu Wei, Fu Li-Bin Instability, adiabaticity, and controlling effects of external fields for the dark state in a homonuclear atom–tetramer conversion system 2014 Chin. Phys. B 23 040306

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