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The European Physical Journal B

, Volume 79, Issue 3, pp 327–334 | Cite as

Optical absorption spectra of finite systems from a conserving Bethe-Salpeter equation approach

  • G. PalEmail author
  • Y. Pavlyukh
  • W. Hübner
  • H. C. SchneiderEmail author
Article

Abstract

We present a method for computing optical absorption spectra by means of a Bethe-Salpeter equation approach, which is based on a conserving linear response calculation for electron-hole coherences in the presence of an external electromagnetic field. This procedure allows, in principle, for the determination of the electron-hole correlation function self-consistently with the corresponding single-particle Green function. We analyze the general approach for a “one-shot” calculation of the photoabsorption cross section of finite systems, and discuss the importance of scattering and dephasing contributions in this approach. We apply the method to the closed-shell clusters Na4, Na\(^{+}_{9}\) and Na\(^{+}_{21}\), treating one active electron per Na atom.

Keywords

Green Function Absorption Cross Section Optical Absorption Spectrum Tion Cross Section Photoabsorption Cross Section 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100BraunschweigGermany
  2. 2.Institut für Physik, Martin-Luther-UniversityHalleGermany
  3. 3.Physics Department and Research Center OPTIMASUniversity of KaiserslauternKaiserslauternGermany

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