Fermionic Concurrence in the Extended Hubbard Model
DENG Shu-Sa, GU Shi-Jian
Department of Physics, The Chinese University of Hong Kong, Hong Kong
Fermionic Concurrence in the Extended Hubbard Model
DENG Shu-Sa;GU Shi-Jian
Department of Physics, The Chinese University of Hong Kong, Hong Kong
关键词 ：
03.67.Mn ,
03.65.Ud ,
71.10.Fd
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.
Key words ：
03.67.Mn
03.65.Ud
71.10.Fd
出版日期: 2005-04-01
:
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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2005, Vol. 22 
