Interplay between disorder and electron interactions: mean-field phase diagram of an Anderson-Hubbard model

1993 ◽  
Vol 156-158 ◽  
pp. 639-645 ◽  
Author(s):  
David E. Logan ◽  
Michael A. Tusch
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Mean Field ◽  
Field Phase ◽  
Electron Interactions

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.

scholarly journals Mean-field phase diagram of the extended Bose-Hubbard model of many-body cavity quantum electrodynamics

2019 ◽  
Vol 99 (4) ◽  
Author(s):  
Lukas Himbert ◽  
Cecilia Cormick ◽  
Rebecca Kraus ◽  
Shraddha Sharma ◽  
Giovanna Morigi
Keyword(s):  
Phase Diagram ◽  
Hubbard Model ◽  
Quantum Electrodynamics ◽  
Mean Field ◽  
Body Cavity ◽  
Cavity Quantum Electrodynamics ◽  
Many Body ◽  
Field Phase

Mean-field phase diagram of cold lattice bosons in disordered potentials

2007 ◽  
Vol 76 (1) ◽  
Author(s):  
P. Buonsante ◽  
V. Penna ◽  
A. Vezzani ◽  
P. B. Blakie
Keyword(s):  
Phase Diagram ◽  
Mean Field ◽  
Field Phase

OLFACTORY NEURAL NETWORK MODEL

1992 ◽  
Vol 06 (27) ◽  
pp. 1721-1728
Author(s):  
N. KAZAKOVA ◽  
VIK. DOTSENKO
Keyword(s):  
Neural Network ◽  
Phase Diagram ◽  
Mean Field ◽  
Hopfield Neural Network ◽  
Network System ◽  
Zero Temperature ◽  
Field Phase ◽  
Simple Generalization ◽  
Neural Network System ◽  
Olfactory Neural Network

A statistical neural network olfactory model is proposed. The model is a simple generalization of the Hopfield neural network system. Retrieval properties are analysed and the zero temperature mean field phase diagram is obtained.

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