superconducting energy gap/ phase diagramBCS-Bose condensation crossover1D Hubbard modelThe ground-state energy, the concentration of double occupied sites and the density of bound electron pairs in low-dimensional attractive Hubbard model are calculated by means of the generalized self-consistent field ...
1、Phase diagram Bose Hubbard 模型哈密顿量: H=−J∑b^i†b^j+∑i(ϵi−μ)n^i+U2∑ib^i†b^i†b^ib^i 根据玻色子的对易关系: [b^i,b^j†]=δi,j H=−J∑b^i†b^j+∑i(ϵi−μ)n^i+U2∑in^i(n^i−1) 显然,多体问题想通过直接ED有些许困难,尤其粒子...
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...
PhasediagramofthedisorderedBose-Hubbard model VGurarie LPollet NikolaiProkof'ev UniversityofMassachuses-Amherst,prokofev@physics.umass.edu BorisSvistunov UniversityofMassachuses-Amherst,svistunov@physics.umass.edu MTroyer Followthisandadditionalworksat:h p://scholarworks.umass.edu/physics_faculty_pubs ...
We investigate the ground-state phase diagram of the soft-core Bose-Hubbard model with the nearest-neighbor repulsion on a square lattice by using an unbiased quantum Monte Carlo method. In contrast to a previous study [P. Sengupta , Phys. Rev. Lett.PRLTAO0031-900710.1103/PhysRevLett....
Bose-HubbardModel StanimirKondov May5,2008 Abstract TheBose-Hubbardhamiltonianwillbeintroducedandjustifiedasaneffectivedescriptionofsome relevantphysicalsystems(dilutealkaligasesinopticallattices,arraysofJosephsonjunctions).Iwill alsoshowameanfieldtheorysolutionandtheresultingphasediagram.Finally,Iwilldescribeindet...
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. ...
As the hard-core Bose–Hubbard model operates in a regime, where \(J/\left|A\right|\ll 1\) (Mott insulator phase), the population of the same lattice site with two or more particles is strongly suppressed due to the presence of the self-Kerr term, irrespective of its sign. One may...
The Bose–Hubbard model with infinite-range interactions has been studied18,19. We note that condensation of DW polaritons is quite distinct from lasing: standard lasing requires inversion of the gain medium, is driven by an incoherent pump and is generally incompatible with strong light–matter ...
Mean-Field Phase Diagram for Bose Hubbard Hamiltonians with Random Hoppingdoi:10.1134/s1054660x07040378P. BuonsanteF. MasselV. PennaA. VezzaniBuonsante P, Massel F, Penna V and Vezzani A 2007 Mean-field phase diagram for Bose-Hubbard Hamiltonians with random hopping Laser Phys. 17 538...