Interaction flow method for many-fermion systems

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

We propose an interaction flow scheme that sums up the perturbation expansion of many-particle systems by successively increasing the interaction strength. It combines the unbiasedness of renormalization group methods with the simplicity of straight-forward perturbation theory. Applying the scheme to fermions in one dimension and to the two-dimensional Hubbard model we find that at one-loop level and low temperatures there is ample agreement with previous one-loop renormalization group approaches. We furthermore present results for the momentum-dependence of spin, charge and pairing interactions in the two-dimensional Hubbard model.
14 pages, 14 figures

Keywords

Strongly Correlated Electrons, Superconductivity

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/23597

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0403633
 http://arxiv.org/abs/cond-mat/0403633
 Phys. Rev. B 70, 235115 (2004)
 doi:10.1103/PhysRevB.70.235115

Collections

arXiv