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- W4300699148 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 Na_4, Na^+_9 and Na^+_(21), treating one active electron per Na atom." @default.
- W4300699148 created "2022-10-04" @default.
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- W4300699148 date "2009-10-18" @default.
- W4300699148 modified "2023-09-23" @default.
- W4300699148 title "Optical absorption spectra of finite systems from a conserving Bethe-Salpeter equation approach" @default.
- W4300699148 doi "https://doi.org/10.48550/arxiv.0910.3406" @default.
- W4300699148 hasPublicationYear "2009" @default.
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