The model is a bosonic analog of the Haldane-Hubbard model. By means of the eQMC, we study the model with both weak and strong on-site repulsions. Numerical study shows that the model has a rich phase diagram. We also found that in the system defined on the honeycomb lattice of the ...
本次更新为笔记的第五部分:Hubbard模型中的Bose-Hubbard Model。 Hubbard Model中根据其on-site repulsion U, hopping intensity J & chemical potential μ 的不同,会给出丰富的不同于经典相的exotic quantum phase,例如Mott Insulator (MI)态、Superfluidity (SF)态、Antiferromagnetic spin order (AFM)等 本章...
在Hubbard Model中，根据on-site repulsion U、hopping intensity J和chemical potential[公式]的不同，会出现多种不同于经典相的exotic quantum phase，如Mott Insulator (MI)态、Superfluidity (SF)态和Antiferromagnetic spin order (AFM)态等。本章主要涵盖Bose-Hubbard Model (BHM)的哈密顿量、两种极...
Weestablishthephasediagramofthedisorderedthree-dimensionalBose-Hubbardmodelatunityfillingwhichhasbeencontroversialformanyyears.Thetheoremofinclusions,proveninRef.[1],statesthattheBoseglassphasealwaysintervenesbetweentheMottinsulatingandsuperfluidphases.Here,wenotethatassumptionsonwhichthetheoremisbasedexcludephase...
We investigate the time evolution of correlations in the Bose-Hubbard model following a quench from the superfluid to the Mott insulator. For large values ... C Kollath,AM L?Uchli,E Altman - 《Physical Review Letters》 被引量: 408发表: 2006年 Phase diagram of the Bose-Hubbard Model on ...
Route to supersolidity for the extended Bose-Hubbard modelWe use the Gutzwiller ansatz and analyze the phase diagram of the extended Bose-Hubbard Hamiltonian with on-site (U) and nearest-neighbor (V) repulsions. For d-dimensional hypercubic lattices, when 2dVU, in this Rapid Communication, we...
Bose-HubbardModel StanimirKondov May5,2008 Abstract TheBose-Hubbardhamiltonianwillbeintroducedandjustifiedasaneffectivedescriptionofsome relevantphysicalsystems(dilutealkaligasesinopticallattices,arraysofJosephsonjunctions).Iwill alsoshowameanfieldtheorysolutionandtheresultingphasediagram.Finally,Iwilldescribeindet...
phase diagram of the extended Bose-Hubbard model on the simple cubic lattice. We add disorder to the extended Bose-Hubbard model and find that the maximum critical temperature for the supersolid phase tends to be suppressed by disorder. But we also find a narrow parameter window in which the ...
Cluster perturbation theoryDensity of statesSpectral propertiesWe study the two-dimensional ultracold Bose gas in optical lattice. We use cluster perturbation theory based on Hubbard X -operators to calculate the spectral function and phase diagram of Bose-Hubbard model which is minimal model to ...
Motivated by experiments on Josephson junction arrays in a magnetic field andultracold interacting atoms in an optical lattice in the presence of syntheticorbital magnetic fields, we study the "fully frustrated" Bose-Hubbard model andquantum XY model with half a flux quantum per lattice plaquette. ...