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.
Received: 27 January 2007
Revised: 25 February 2007
Accepted manuscript online:
(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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