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Chinese Physics, 2005, Vol. 14(6): 1168-1173    DOI: 10.1088/1009-1963/14/6/019
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Thermal entanglement in 1D optical lattice chains with nonlinear coupling

Zhou Ling (周玲), Yi Xue-Xi (衣学喜), Song He-Shan (宋鹤山), Guo Yan-Qing (郭彦青)
Department of Physics,Dalian University of Technology, Dalian 116024, China
Abstract  The thermal entanglement of spin-1 atoms with nonlinear coupling in an optical lattice chain is investigated for two-particle and multi-particle systems. It is found that the relation between linear coupling and nonlinear coupling is the key to determine thermal entanglement, which shows in what kinds of atoms thermal entanglement exists. This result is true both for two-particle and multi-particle systems. For multi-particle systems, the thermal entanglement does not decrease greatly, and the critical temperature decreases only slightly.
Keywords:  optical lattice chain      nonlinear coupling      thermal entanglement  
Received:  02 August 2004      Revised:  24 January 2005      Accepted manuscript online: 
PACS:  42.50.-p (Quantum optics)  
  32.80.-t (Photoionization and excitation)  
  42.65.-k (Nonlinear optics)  
Fund: Project supported by the National Natural Science Foundation of China(Grant Nos 10347103 and 10305002

Cite this article: 

Zhou Ling (周玲), Yi Xue-Xi (衣学喜), Song He-Shan (宋鹤山), Guo Yan-Qing (郭彦青) Thermal entanglement in 1D optical lattice chains with nonlinear coupling 2005 Chinese Physics 14 1168

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