Charge collective modes and dynamic pairing in the three-band Hubbard model. I. Weak-coupling limit

1993 ◽  
Vol 47 (6) ◽  
pp. 3323-3330 ◽  
Author(s):  
Yunkyu Bang ◽  
G. Kotliar ◽  
R. Raimondi ◽  
C. Castellani ◽  
M. Grilli
Keyword(s):  
Hubbard Model ◽  
Weak Coupling ◽  
Weak Coupling Limit ◽  
Collective Modes

scholarly journals Pairing symmetry of the one-band Hubbard model in the paramagnetic weak-coupling limit: A numerical RPA study

2015 ◽  
Vol 92 (10) ◽  
Author(s):  
A. T. Rømer ◽  
A. Kreisel ◽  
I. Eremin ◽  
M. A. Malakhov ◽  
T. A. Maier ◽  
...  
Keyword(s):  
Hubbard Model ◽  
Weak Coupling ◽  
Weak Coupling Limit ◽  
Pairing Symmetry ◽  
The One

A WEAK COUPLING THEORY FOR La2CuO4: ln2–PARQUET APPROACH

1988 ◽  
Vol 02 (05) ◽  
pp. 667-677 ◽  
Author(s):  
I. E. Dzyaloshinskii ◽  
V. M. Yakovenko
Keyword(s):  
Fermi Surface ◽  
Hubbard Model ◽  
Weak Coupling ◽  
Weak Coupling Limit ◽  
Two Dimensional ◽  
Coupling Theory ◽  
Strong Difference ◽  
Effective Charges ◽  
Weak Coupling Theory

In the model of two-dimensional electrons with a square Fermi surface , ln 2-parquet equations are derived and numerically solved. It is suggested that this model can describe La 2 CuO 4 in the weak coupling limit. The main result is a strong difference between the Hubbard model with one charge and the model with four effective charges, describing an interaction of a general form.

scholarly journals An obstacle to sub-AdS holography for SYK-like models

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Pengfei Zhang ◽  
Yingfei Gu ◽  
Alexei Kitaev
Keyword(s):  
Lyapunov Exponent ◽  
Weak Coupling ◽  
Kinetic Coefficient ◽  
Weak Coupling Limit ◽  
Branching Time ◽  
Quasiparticle Lifetime

Abstract We argue that “stringy” effects in a putative gravity-dual picture for SYK-like models are related to the branching time, a kinetic coefficient defined in terms of the retarded kernel. A bound on the branching time is established assuming that the leading diagrams are ladders with thin rungs. Thus, such models are unlikely candidates for sub-AdS holography. In the weak coupling limit, we derive a relation between the branching time, the Lyapunov exponent, and the quasiparticle lifetime using two different approximations.

Superconducting pairing of the extended multiband Hubbard model: A weak-coupling study

1990 ◽  
Vol 41 (1) ◽  
pp. 853-856 ◽  
Author(s):  
R. Putz ◽  
B. Ehlers ◽  
L. Lilly ◽  
A. Muramatsu ◽  
W. Hanke
Keyword(s):  
Hubbard Model ◽  
Weak Coupling ◽  
Superconducting Pairing
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