Fermionic concurrence in the extended Hubbard dimer

Details Fermionic concurrence in the extended Hubbard dimer Fermionic concurrence in the extended Hubbard dimer

2004-06-12

arxiv.org/abs/quant-ph/0406078v1

Chin. Phys. Lett. 22, 804 (2005).

Physics

Quantum Physics

5 pages, 7 figures

Scientific paper

10.1088/0256-307X/22/4/007

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.

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