scholarly journals Quantum Monte Carlo evidence ford-wave pairing in the two-dimensional Hubbard model at a van Hove singularity

1996 ◽  
Vol 54 (22) ◽  
pp. 16179-16182 ◽  
Author(s):  
T. Husslein ◽  
I. Morgenstern ◽  
D. M. Newns ◽  
P. C. Pattnaik ◽  
J. M. Singer ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Hubbard Model ◽  
Quantum Monte Carlo ◽  
Two Dimensional ◽  
Van Hove Singularity ◽  
Wave Pairing

scholarly journals Phase separation in the two-dimensional Hubbard model: A fixed-node quantum Monte Carlo study

1998 ◽  
Vol 58 (22) ◽  
pp. R14685-R14688 ◽  
Author(s):  
A. C. Cosentini ◽  
M. Capone ◽  
L. Guidoni ◽  
G. B. Bachelet
Keyword(s):  
Monte Carlo ◽  
Phase Separation ◽  
Hubbard Model ◽  
Quantum Monte Carlo ◽  
Monte Carlo Study ◽  
Two Dimensional ◽  
Fixed Node

A SINGLE HOLE IN THE TWO-DIMENSIONAL INFINITE-U HUBBARD MODEL IN AN ORBITAL MAGNETIC FIELD

1994 ◽  
Vol 08 (06) ◽  
pp. 707-725
Author(s):  
S. V. MESHKOV ◽  
J. C. ANGLÈS D'AURIAC
Keyword(s):  
Magnetic Field ◽  
Monte Carlo ◽  
Hubbard Model ◽  
Ground State ◽  
Quantum Monte Carlo ◽  
Applied Field ◽  
Monte Carlo Algorithm ◽  
Two Dimensional ◽  
Thermodynamical Properties ◽  
Single Hole

Using an original Quantum Monte Carlo algorithm, we study the thermodynamical properties of a single hole in the two-dimensional infinite-U Hubbard model at finite temperature. We investigate the energy and the spin correlators as a function of an external orbital magnetic field. This field is found to destroy the Nagaoka ferromagnetism and to induce chirality in the spin background. The applied field is partially screened by a fictitious magnetic field coming from the chirality. Our algorithm allows us to reach a temperature low enough to discuss the ground state properties of the model.

scholarly journals NEW COMPARISONS FOR LOCAL QUANTITIES OF THE TWO-DIMENSIONAL HUBBARD MODEL

2003 ◽  
Vol 17 (04n06) ◽  
pp. 554-559 ◽  
Author(s):  
ADOLFO AVELLA ◽  
FERDINANDO MANCINI
Keyword(s):  
Monte Carlo ◽  
Hubbard Model ◽  
Quantum Monte Carlo ◽  
Approximation Scheme ◽  
Operator Method ◽  
Numerical Data ◽  
Two Dimensional ◽  
Double Occupancy ◽  
Half Filling ◽  
Composite Operator Method

We have compared the results of out approximation scheme, the composite operator, method, for the double occupancy and the internal energy of the two-dimensional Hubbard model with numerical data obtained by means of the Lanczos1and quantum Monte Carlo schemes.2The agreement is very good at both half-filling and away from it showing how reliable is the approximation scheme.

scholarly journals Quantum Monte Carlo study of the two-dimensional fermion Hubbard model

2009 ◽  
Vol 80 (7) ◽  
Author(s):  
C. N. Varney ◽  
C.-R. Lee ◽  
Z. J. Bai ◽  
S. Chiesa ◽  
M. Jarrell ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Hubbard Model ◽  
Quantum Monte Carlo ◽  
Monte Carlo Study ◽  
Two Dimensional
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