Penson-Kolb-Hubbard model: A study of the competition between single-particle and pair hopping in one dimension

1993 ◽  
Vol 48 (4) ◽  
pp. 2063-2073 ◽  
Author(s):  
Achille Hui ◽  
S. Doniach
Keyword(s):  
Hubbard Model ◽  
Single Particle ◽  
One Dimension ◽  
Pair Hopping

Energy input and scaling laws for a single particle vibrating in one dimension

1995 ◽  
Vol 52 (5) ◽  
pp. 5596-5601 ◽  
Author(s):  
Stephen Warr ◽  
Jonathan M. Huntley
Keyword(s):  
Single Particle ◽  
Energy Input ◽  
Scaling Laws ◽  
One Dimension

A controlled route to the competing phases and the single-particle spectral function in the ground state of the 2D Hubbard model

2007 ◽  
Vol 460-462 ◽  
pp. 248-251
Author(s):  
Werner Hanke ◽  
Markus Aichhorn ◽  
Enrico Arrigoni ◽  
Michael Potthoff
Keyword(s):  
Hubbard Model ◽  
Spectral Function ◽  
Single Particle ◽  
Ground State

Equilibrium and Dynamical Properties of the Boson Hubbard Model in One Dimension

2005 ◽  
Vol 140 (3-4) ◽  
pp. 313-332 ◽  
Author(s):  
R. T. Scalettar ◽  
G. Batrouni ◽  
P.J.H. Denteneer ◽  
F. Hébert ◽  
A. Muramatsu ◽  
...  
Keyword(s):  
Hubbard Model ◽  
One Dimension ◽  
Dynamical Properties ◽  
Boson Hubbard Model

Single-Particle Motion in One Dimension

2020 ◽  
pp. 29-60
Author(s):  
Christopher W. Kulp ◽  
Vasilis Pagonis
Keyword(s):  
Single Particle ◽  
Particle Motion ◽  
One Dimension ◽  
Single Particle Motion

η-PAIRING SUPERCONDUCTIVITY IN THE NEGATIVE-U HUBBARD MODEL: EFFECT OF FLUCTUATIONS AND DISORDER

1994 ◽  
Vol 08 (15) ◽  
pp. 2041-2058
Author(s):  
JÜRGEN STEIN
Keyword(s):  
Phase Diagram ◽  
Asymptotic Expansion ◽  
Hubbard Model ◽  
Strong Coupling ◽  
Mean Field ◽  
Higher Order ◽  
Field Phase ◽  
Effective Pair ◽  
The Mean ◽  
Pair Hopping

We have studied the influence of singular fluctuations around the mean-field solution as well as higher order contributions to the geometry controlled asymptotic expansion of the propagators on η-pairing superconductivity in the strong coupling negative-U Hubbard model in the presence of unpaired electrons. The modifications of the mean-field results due to the introduction of disorder and allowance for finite U are also calculated. Besides the singularities already present in the O(2) nonlinear σ-model we find a filling-depending singular depression of the repulsive effective pair-hopping interaction which strongly alters the mean-field phase diagram and appears to suppress the η-pairing phase near the band edges.

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