Phase diagram of the one-dimensional Anderson lattice

Phase diagram of the one-dimensional periodic Anderson model

Phase diagram of the two-dimensional Anderson-Hubbard model.

We study the ground state of the two-dimensional Anderson-Hubbard model using a quantum real space renormalization group method. We obtain the phase diagram near half filling. The system is always insulating with disorder. At half filling, the system undergoes a transition from a gapless (Anderson) insulator to an incompressible (Mott-Hubbard) insulator as the interaction U reaches a critical v...

Phase diagram of the two-dimensional lattice Coulomb gas

The nature of phase transitions in the two-dimensional ~2D! neutral Coulomb gas ~CG! has remained a topic of considerable interest. The CG can be related via duality transformation to the 2D XY model, and thus to superfluid and superconducting films. The pioneering work of Kosterlitz and Thouless ~KT! showed that, at low charge density, there is a second order transition from an insulating to a...

Phase diagram of one-dimensional driven lattice gases with open boundaries

We consider the asymmetric simple exclusion process (ASEP) with open boundaries and other driven stochastic lattice gases of particles entering, hopping and leaving a onedimensional lattice. The long-term system dynamics, stationary states, and the nature of phase transitions between steady states can be understood in terms of the interplay of two characteristic velocities, the collective veloc...

Phase diagram of the one-dimensional t-J model.

We present an analytic study of the phase diagram of the one-dimensional t − J model and a couple of its cousins. To deal with the interactions induced by the no double occupancy constraints, we introduce a deformation of the Hubbard operators. When the deformation parameter ∆ is small, the induced interactions are softened, accessible by perturbation theory. We combine bososnization with renor...