- Tytuł:
- Simplified Parquet Equations for the Anderson Impurity Model: Comparison with Numerically Exact Solutions
- Autorzy:
-
Pokorný, V.
Žonda, M.
Kauch, A.
Janiš, V. - Powiązania:
- https://bibliotekanauki.pl/articles/1032140.pdf
- Data publikacji:
- 2017-04
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
71.10.Fd
72.15.Qm
74.40.Kb - Opis:
- We use an analytic solver for the single-impurity Anderson model based on simplified parquet equations to describe the Kondo asymptotics. This scheme uses a two-particle self-consistency to control the strong-coupling Kondo critical behavior of this model at half filling. The equations can be written in the real-frequency representation, which gives us direct access to spectral functions unlike numerical schemes in the Matsubara formalism. We compare our results to those obtained by second-order perturbation theory, numerical renormalization group, and continuous-time quantum Monte Carlo in order to assess the reliability of this approximation.
- Źródło:
-
Acta Physica Polonica A; 2017, 131, 4; 1042-1044
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł