Self-consistent calculation of the electronic spectrum and the dynamic spin susceptibility for the two-dimensional Hubbard model

1993 ◽  
Vol 48 (14) ◽  
pp. 10514-10519 ◽  
Author(s):  
S. Wermbter ◽  
L. Tewordt
Keyword(s):  
Hubbard Model ◽  
Electronic Spectrum ◽  
Spin Susceptibility ◽  
Two Dimensional ◽  
Consistent Calculation ◽  
Dynamic Spin ◽  
Self Consistent

Dynamic spin susceptibility in the Hubbard model

1997 ◽  
Vol 113 (1) ◽  
pp. 1309-1321 ◽  
Author(s):  
V. A. Moskalenko ◽  
N. M. Plakida
Keyword(s):  
Hubbard Model ◽  
Spin Susceptibility ◽  
Dynamic Spin

scholarly journals Self-consistent effective Hamiltonian theory for fermionic many-body systems

2020 ◽  
pp. 2150019
Author(s):  
Xindong Wang ◽  
Hai-Ping Cheng
Keyword(s):  
Hubbard Model ◽  
Order Parameter ◽  
Cooper Pair ◽  
Effective Hamiltonian ◽  
Two Dimensional ◽  
Body System ◽  
Many Body ◽  
Hamiltonian Theory ◽  
Self Consistent ◽  
Many Body Systems

Using a separable many-body variational wavefunction, we formulate a self-consistent effective Hamiltonian theory for fermionic many-body system. The theory is applied to the two-dimensional (2D) Hubbard model as an example to demonstrate its capability and computational effectiveness. Most remarkably for the Hubbard model in 2D, a highly unconventional quadruple-fermion non-Cooper pair order parameter is discovered.

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