Bose-Hubbard modelsuperfluid phaseMott-insulatordensity-wavesupersolid.We develop an inhomogeneous mean-field theory for the extended Bose-Hubbard model with a quadratic, confining potential. In the absence of this potential, our mean-field theory yields the phase diagram of the homogeneous extended ...
Perturbative corrections to the Gutzwiller mean-field solution of the Mott-Hubbard model. Phys. Rev. A 70, 053609 (2004).C. Schroll, F. Marquardt, and C. Bruder. Perturbative corrections to the Gutzwiller mean-field solution of the Mott-Hubbard model. Physical Review A, 70:053609, 2004....
The Inhomogeneous Extended Bose-Hubbard Model: A Mean-Field Theory We develop an inhomogeneous mean-field theory for the extended Bose-Hubbard model with a quadratic, confining potential. In the absence of this potential, ... JM Kurdestany,RV Pai,R Pandit - 《Annalen Der Physik》 被引量: ...
Using functional techniques, the Hubbard model consisting of self-coupled lattice fermions is transformed into a bosonic functional integral. In this form it is treated by a mean field approximation in its modern version as a systematic expansion around a saddle point. The method is generalized to...
strongly correlated electron systemsheavy fermionslattice fermion models (hubbard model, etc.)We present an embedding approach based on localized basis functions which permits an efficient application of the dynamical mean-field theory (DMFT) to inhomogeneous correlated materials, such as semi-infinite ...
Mean-Field Theory Abstract This chapter is devoted to applications of the mean-field approximation in metals. We confine the presentation to the Hubbard model, which is relevant to the narrow-band metals. This way we avoid unnecessary technicalities and make a link with further chapters....
equation in the mean-field and semiclassical regime article 12 august 2016 mean field derivation of dnls from the bose–hubbard model article open access 01 october 2021 use our pre-submission checklist avoid common mistakes on your manuscript. 1 introduction and notation in classical mechanics, ...
A new mean field theory is proposed for the Mott transition in the Hubbard model based on the slave rotor representation of the electron operator. This theory provides a better description of the role of the long range charge correlation in the Mott insulating state and offers a good estimation...
Slave spin cluster mean field theory away from half-filling: Application to the Hubbard and the extended Hubbard Model Slave spin cluster mean field theory away from half-filling: Application to the Hubbard and the extended Hubbard ModelA new slave-spin representation of ... SR Hassan,LD Medici...
Specifically we use this approximation to study the two-dimensional (2D) Hubbard model on a square lattice far from half filling. In this situation, we calculate the specific heat and find that when the filling decreases, that is, antiferromagnetic correlations become less important, the agreement...