Screened Interaction and Self-Energy in an Infinitesimally Polarized Electron Gas via the Kukkonen-Overhauser Method

Abstract

The screened electron-electron interaction $W_{\sigma ,{\sigma }^{\prime }}$ and the electron self-energy in an infinitesimally polarized electron gas are derived by extending the approach of Kukkonen and Overhauser. Various quantities in the expression for $W_{\sigma ,{\sigma }^{\prime }}$ are identified in terms of the relevant response functions of the electron gas. The self-energy is obtained from $W_{\sigma ,{\sigma }^{\prime }}$ by making use of the GW method which in this case represents a consistent approximation. Contact with previous calculations is made.

arXiv comment7 pages

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