Self-consistent calculation of physical quantities for the two-dimensional hubbard model and comparison with cuprate high-T c superconductors

1994 ◽  
Vol 96 (5-6) ◽  
pp. 275-294 ◽  
Author(s):  
T. Dahm ◽  
L. Tewordt ◽  
S. Wermbter
Keyword(s):  
Hubbard Model ◽  
Two Dimensional ◽  
Consistent Calculation ◽  
Self Consistent ◽  
Physical Quantities

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.

Self consistent calculation of D-wave superconductivity in Hubbard model

1994 ◽  
Vol 235-240 ◽  
pp. 2177-2178 ◽  
Author(s):  
St. Lenck ◽  
J.P. Carbotte ◽  
R.C. Dynes
Keyword(s):  
Hubbard Model ◽  
Consistent Calculation ◽  
Self Consistent ◽  
D Wave
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