4 papers · 1 filter
Effect of anisotropic hopping on the Bose Hubbard model phase diagram: strong-coupling perturbation theory on a square lattice
J. K. Freericks
There has been a recent resurgence of experimental efforts to quantitatively determine the phase diagram of the Bose Hubbard model by carefully analyzing experiments with ultracold…
Nonequilibrium sum rules for the retarded self-energy of strongly correlated electrons
V. Turkowski, J. K. Freericks
We derive the first two moment sum rules of the conduction electron retarded self-energy for both the Falicov-Kimball model and the Hubbard model coupled to an external spatially u…
Quenching Bloch oscillations in a strongly correlated material
J. K. Freericks
Dynamical mean-field theory is generalized to solve the nonequilibrium Keldysh boundary problem: a system is started in equilibrium at a temperature T=0.1, a uniform electric field…
Theory of valence transitions in ytterbium-based compounds
V. Zlatic', J. K. Freericks
The anomalous behavior of YbInCu4 and similar compounds is modeled by the exact solution of the spin one-half Falicov-Kimball model in infinite dimensions. The valence-fluctuating…