Second-order self-consistent perturbation theory calculations for thermal and quasiparticle properties of the disordered Hubbard model
Abstract
We numerically calculate thermal and quasiparticle properties of the one- and two-dimensional attractive Hubbard model with disorder via second-order self-consistent perturbation theory. By comparison with first-order perturbation theory results, we show that increasing disorder leads to an enhancement of contributions to these properties from higher-order interaction effects. At the same time, second-order interaction effects tend to smooth disorder-induced spatial variations in local quantities. We also describe the corrections from second order perturbation theory on the spatial extent of quasiparticle wave functions as well as the quasiparticle scattering lifetime.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2001
- Bibcode:
- 2001APS..MARZ15009D