Fermionic concurrence in the extended Hubbard dimer

Chin. Phys. Lett. 22, 804 (2005). In this paper, we introduce and study the fermionic concurrence in a two-site extended Hubbard model. Its behaviors both at the ground state and finite temperatures as function of Coulomb interaction $U$ (on-site) and $V$ (nearest-neighbor) are obtained analytically...

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Bibliographic Details
Main Authors Deng, Shu-Sa, Gu, Shi-Jian, Lin, Hai-Qing
Format Journal Article
LanguageEnglish
Published 12.06.2004
Subjects
Physics - Quantum Physics
Physics - Strongly Correlated Electrons
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Summary:Chin. Phys. Lett. 22, 804 (2005). In this paper, we introduce and study the fermionic concurrence in a two-site extended Hubbard model. Its behaviors both at the ground state and finite temperatures as function of Coulomb interaction $U$ (on-site) and $V$ (nearest-neighbor) are obtained analytically and numerically. We also investigate the change of the concurrence under a nonuniform field, including local potential and magnetic field, and find that the concurrence can be modulated by these fields.
DOI:10.48550/arxiv.quant-ph/0406078