Screening in the exchange term of the electron-hole interaction of the Bethe-Salpeter equation

被引：26

作者：

Benedict, LX ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, H Div, Phys & Adv Technol Directorate, Livermore, CA 94550 USA

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.66.193105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Bethe-Salpeter equation (BSE), governing the dynamics of a particle-hole pair in a many-body system, is considered for the case in which the two-particle propagator is constructed from a finite set of particle-hole states. It is shown that in this case, it may be appropriate to screen the exchange kernel of the BSE with a background dielectric function epsilon(BG). An application to the computation of optical excitation spectra in quantum dots is discussed.

引用

页码：1931051 / 1931053

页数：3

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