• Corpus ID: 238857170

Density-matrix functional theory of the attractive Hubbard model: Statistical analogy of pairing correlations

@inproceedings{Muller2021DensitymatrixFT,
  title={Density-matrix functional theory of the attractive Hubbard model: Statistical analogy of pairing correlations},
  author={Thomas Muller and G. M. Pastor},
  year={2021}
}
The ground-state properties of the Hubbard model with attractive local pairing interactions are investigated in the framework of lattice density-functional theory. A remarkable correlation is revealed between the interaction-energy functional W [η] corresponding to the Bloch-state occupationnumber distribution ηkσ and the entropy S[η] of a system of non-interacting fermions having the same ηkσ. The relation between W [η] and S[η] is shown to be approximately linear for a wide range of ground… 

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