Fermionic Concurrence in the Extended Hubbard Model

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2005,（4）
• 页码范围: 804-807
• 页数: 4页
• 语种: 英文

摘要

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.