The phase transitions in the Bose-Fermi-Hubbard model are investigated. The boson Greens function is calculated in the random phase approximation (RPA) and the formalism of the Hubbard operators is used. The regions of existence of the superfluid and Mott insulator phases are established and the ...
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....
exact solution of the bose-hubbard model on the bethe lattice 热度: effects of thermal and quantum fluctuations on the phase diagram of a spin-1 87rb bose-einstein condensate 热度: phase diagram of vortices in high-tc superconductors from lattice defect model with pinning ...
Generic phase diagram of the Bose-Hubbard model in a one dimensional lattice as a function of the hopping parameter J and the chemical potential μc. A trajectory along the red line can cross the critical point without any transition from the superfluid (SF) phase to the Mott insulator (MI...
In this paper, we study the dynamics of the Bose-Hubbard model with the nearest-neighbor repulsion by using time-dependent Gutzwiller methods. Near the unit filling, the phase diagram of the model contains density wave (DW), supersolid (SS) and superfluid (SF). The three phases are separated...
We present a general method for determining the phase diagram of systems of a finite number of one dimensional Hubbard--like systems coupled by single--particle hopping with weak interactions. The technique is illustrated by detailed calculations for the two--chain Hubbard model, providing the first...
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...
Phase diagram of the extended Bose Hubbard model By means of the Density Matrix Renormalization Group technique, we accurately determine the zero-temperature phase diagram of the one-dimensional extended ... D Rossini,R Fazio - 《New Journal of Physics》 被引量: 25发表: 2012年 Phase transitions...
The fermionic Hubbard model (FHM)1 describes a wide range of physical phenomena resulting from strong electron–electron correlations, including conjectured mechanisms for unconventional superconductivity. Resolving its low-temperature physics is, however, challenging theoretically or numerically. Ultracold ferm...
Quantum Monte Carlo Simulations of the Kosterlitz-Thouless Transition for Two-Dimensional Disordered Bose-Hubbard Model By changing the variance of the Gaussian distribution, we found that the transition temperature decreases as the variance increases. The phase diagram is ... H Kuroyanagi,M Tsukamoto...