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Landau-Gutzwiller quasi-particles


Florian Gebhard


We de?ne Landau quasiparticles within the Gutzwiller variational theory and derive their dispersion relation for general multiband Hubbard models in the limit of large spatial dimensions D. Thereby we reproduce our previous calculations which were based on a phenomenological effective single-particle Hamiltonian. For the one-band Hubbard model we calculate the frst-order corrections in 1/D and ?nd that the corrections to the quasiparticle dispersions are small in three dimensions. They may be largely absorbed in a rescaling of the total bandwidth, unless the system is close to half band ?lling. Therefore, the Gutzwiller theory in the limit of large dimensions provides quasiparticle bands which are suitable for a comparison with real, three-dimensional Fermi liquids.


B√ľnemann, J., Gebhard, F., & Thul, R. (2003). Landau-Gutzwiller quasi-particles. Physical Review B, 67, Article 075103.

Journal Article Type Article
Publication Date Feb 10, 2003
Deposit Date Nov 19, 2008
Publicly Available Date Nov 19, 2008
Journal Physical Review B
Print ISSN 2469-9950
Electronic ISSN 1098-0121
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 67
Article Number 075103
Public URL
Publisher URL


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