Time-dependent exchange-correlation potential in lieu of self-energy

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Abstract

It is shown that the equation of motion of the one-particle Green function of an interacting many-electron system is governed by a multiplicative time-dependent exchange-correlation potential, which is the Coulomb potential of a time-dependent exchange-correlation hole. This exchange-correlation hole fulfills a sum rule, a generalization of the well-known sum rule of the static exchange-correlation hole. It is envisaged that the proposed formalism may provide an alternative route for calculating the Green function by finding a suitable approximation for the exchange-correlation hole or potential based on, e.g., a local-density approximation.

Original languageEnglish
Article number075106
JournalPhysical Review B
Volume105
Issue number7
DOIs
Publication statusPublished - 2022 Feb 15

Subject classification (UKÄ)

  • Condensed Matter Physics

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