scholarly journals Quasiparticle undressing in a dynamic Hubbard model: Exact diagonalization study

2002 ◽  
Vol 66 (6) ◽  
Author(s):  
J. E. Hirsch
Keyword(s):  
Hubbard Model ◽  
Exact Diagonalization ◽  
Dynamic Hubbard Model

Infinite-U Hubbard model in the large-spin regime: exact diagonalization study

1991 ◽  
Vol 3 (22) ◽  
pp. 3973-3981 ◽  
Author(s):  
J C Angles d'Auriac ◽  
B Doucot ◽  
R Rammal
Keyword(s):  
Hubbard Model ◽  
Exact Diagonalization ◽  
Large Spin

scholarly journals Dynamic Hubbard model: Effect of finite boson frequency

2003 ◽  
Vol 68 (22) ◽  
Author(s):  
F. Marsiglio ◽  
R. Teshima ◽  
J. E. Hirsch
Keyword(s):  
Hubbard Model ◽  
Dynamic Hubbard Model

Exact diagonalization study on the extended Hubbard model in an anisotropic triangular lattice

2008 ◽  
Vol 69 (12) ◽  
pp. 3334-3336 ◽  
Author(s):  
Ken Kanada ◽  
Tsutomu Watanabe ◽  
Seiichiro Onari ◽  
Yukio Tanaka
Keyword(s):  
Hubbard Model ◽  
Triangular Lattice ◽  
Exact Diagonalization ◽  
Extended Hubbard Model

scholarly journals Exact diagonalization scheme for the degenerate two-orbital Hubbard model on a ring

2009 ◽  
Vol 150 (4) ◽  
pp. 042020
Author(s):  
Canio Noce ◽  
Alfonso Romano ◽  
Maria Emilia Amendola ◽  
Mario Cuoco
Keyword(s):  
Hubbard Model ◽  
Exact Diagonalization

Application of the SD Technique for Solving a BCS-Reduced Hubbard like Hamiltonian

1997 ◽  
Vol 08 (05) ◽  
pp. 1037-1061 ◽  
Author(s):  
Werner Fettes ◽  
Ingo Morgenstern ◽  
Thomas Husslein
Keyword(s):  
Physical Properties ◽  
Hubbard Model ◽  
Detailed Analysis ◽  
Ground State ◽  
Correlation Functions ◽  
Nearest Neighbor ◽  
Exact Diagonalization ◽  
Long Range Order ◽  
Technical Details ◽  
Diagonalization Algorithm

We present exact and stochastic diagonalization results for a BCS-reduced Hubbard model. The kinetic Hamiltonian is the same as in the single band Hubbard model with additional next nearest neighbor hopping. The interaction of this model is designed to inhibit superconductivity in the d x2-y2 channel. The ground state of this model is studied by exact and stochastic diagonalization technique. We present a review of the technical details of the application of the stochastic diagonalization algorithm on this problem. To verify our results obtained with the stochastic diagonalization, they are compared with the exact diagonalization results. In order to show the convergence of the stochastic diagonalization we give a detailed analysis of the behavior of physical properties with increasing number of states. Finally we study superconductivity in this BCS-reduced Hubbard model. As an indicator of superconductivity we use the occurrence of Off Diagonal Long Range Order. We study the scaling behavior of this model for various attractive interactions and in addition the dependence of the superconducting correlation functions from the filling of the system.

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