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Chinese Physics, 2007, Vol. 16(9): 2544-2548    DOI: 10.1088/1009-1963/16/9/008
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Density matrix of two interacting particles with kinetic coupling derived in bipartite entangled state representation

Guo Qin(郭琴)
Department of Physics, Shanghai Jiaotong University, Shanghai 200030, China;Department of Physics, Jiangxi Normal University, Nanchang 330022, China
Abstract  A density matrix is usually obtained by solving the Bloch equation, however only a few Hamiltonians' density matrices can be analytically derived. The density matrix for two interacting particles with kinetic coupling is hard to derive by the usual method due to this coupling; this paper solves this problem by using the bipartite entangled state representation.
Keywords:  density matrix      the bipartite entangled state representation      kinetic coupling  
Received:  27 January 2007      Revised:  25 February 2007      Accepted manuscript online: 
PACS:  03.65.Ud (Entanglement and quantum nonlocality)  
  02.10.Yn (Matrix theory)  
  03.65.Fd (Algebraic methods)  
  03.65.Ge (Solutions of wave equations: bound states)  
  03.67.Mn (Entanglement measures, witnesses, and other characterizations)  
Fund: Project supported by the Specialized Research Fund for the Doctorial Progress of Higher Education in China.

Cite this article: 

Guo Qin(郭琴) Density matrix of two interacting particles with kinetic coupling derived in bipartite entangled state representation 2007 Chinese Physics 16 2544

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