Successes and failures of Bethe ansatz density functional theory

被引：23

作者：

Schenk, Stefan ^{[1
]}

Dzierzawa, Michael ^{[1
]}

Schwab, Peter ^{[1
]}

Eckern, Ulrich ^{[1
]}

机构：

[1] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.78.165102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The response of a one-dimensional fermion system is investigated using density functional theory (DFT) within the local-density approximation (LDA) and compared with exact results. It is shown that DFT-LDA reproduces surprisingly well some of the characteristic features of the Luttinger liquid, for example, the dispersion of the collective charge excitations. On the other hand, the approximation fails even qualitatively for details of the dynamic response and for quantities for which backscattering is important, i.e., those quantities which are crucial for an accurate description of transport. In particular, the Drude weight in the presence of a single impurity is discussed.

引用

页数：6

共 32 条

[1] Density functional formulations for quantum chains [J].