Fermionic Concurrence in the Extended Hubbard Model

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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