Nonequilibrium perturbative formalism and spectral function for the Anderson model

• Published in: Condensed Matter Physics
• Date: 2007
• Main Author: Hamasaki, M.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 2007
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/118381
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Nonequilibrium perturbative formalism and spectral function for the Anderson model / M. Hamasaki // Condensed Matter Physics. — 2007. — Т. 10, № 2(50). — С. 235-248. — Бібліогр.: 29 назв. — англ.

The present work is based on the nonequilibrium perturbative formalism. There the self-energies are derived up to the fourth-order. Consequently, it proves that the nonequilibrium (real-time) perturbative expansion can be connected with the Matsubara imaginary-time perturbative expansion for equil...