Chin. Phys. Lett.  2005, Vol. 22 Issue (4): 804-807    DOI:
Original Articles |
Fermionic Concurrence in the Extended Hubbard Model
DENG Shu-Sa;GU Shi-Jian
Department of Physics, The Chinese University of Hong Kong, Hong Kong
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DENG Shu-Sa, GU Shi-Jian 2005 Chin. Phys. Lett. 22 804-807
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Abstract We study the fermionic concurrence in an extended Hubbard model. Its behaviour at the ground state and at finite temperatures for general U and V is obtained numerically and analytically for a dimer system. We also investigate the properties of the concurrence under a nonuniform field, and we find that it can be used to modulate and to increase the concurrence.
Keywords: 03.67.Mn      03.65.Ud      71.10.Fd     
Published: 01 April 2005
PACS:  03.67.Mn (Entanglement measures, witnesses, and other characterizations)  
  03.65.Ud (Entanglement and quantum nonlocality)  
  71.10.Fd (Lattice fermion models (Hubbard model, etc.))  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2005/V22/I4/0804
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GU Shi-Jian
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