User account menu

  • Log in
Home
Theoretical Spectroscopy Group

Main navigation

  • Home
  • People
    • Andrea Cucca
    • Christine Giorgetti
    • Francesco Sottile
    • Lucia Reining
    • Matteo Gatti
    • Valerie Veniard
    • Vitaly Gorelov
      • Fatema Mohamed
      • Kevin Leveque-Simon
      • Felana Andriambelaza
      • Maram Ali Ahmed Musa
      • Sarbajit Dutta
      • Marc Aichner
      • Carlos Rodriguez Perez
      • Jean Goossaert
      • Niklas Penner
    • Former Members
  • How to Reach Us
  • Research
    • Strong Correlation
    • Plasmons and EELS
    • Developments in TDDFT
    • Excitons and Exciton Dispersion
    • Larger Public
    • Low dimensional materials
    • Non-linear Optics
    • Scientific goals and main achievements
    • Theory Developments
    • Software
    • Publications
    • Thesis
  • Training
  • ETSF Events

Spectroscopy of the Hubbard dimer: the spectral potential

Breadcrumb

  • Home
  • Spectroscopy of the Hubbard dimer: the spectral potential
Author
Marco Vanzini
Lucia Reining
Matteo Gatti
Keywords
paper
Abstract

The spectral potential is the dynamical generalization of the Kohn\textendashSham potential. It targets, in principle exactly, the spectral function in addition to the electronic density. Here we examine the spectral potential in one of the simplest solvable models exhibiting a non-trivial interplay between electron-electron interaction and inhomogeneity, namely the asymmetric Hubbard dimer. We discuss a general strategy to introduce approximations, which consists in calculating the spectral potential in the homogeneous limit (here represented by the symmetric Hubbard dimer) and importing it in the real inhomogeneous system through a suitable \textquoteleft\textquoteleftconnector\textquoteright\textquoteright. The comparison of different levels of approximation to the spectral potential with the exact solution of the asymmetric Hubbard dimer gives insights about the advantages and the difficulties of this connector strategy for applications in real materials.

Year of Publication
2018
Journal
The European Physical Journal B
Volume
91
Number of Pages
192
Date Published
Aug
ISSN Number
1434-6036
URL
https://doi.org/10.1140/epjb/e2018-90277-3
DOI
10.1140/epjb/e2018-90277-3
Download citation
  • DOI
  • Google Scholar
  • BibTeX
  • RIS

Developed & Designed by Alaa Haddad. Customized by ETSF Palaiseau © 2025.