75 citations · 381 across the 13 of their papers we have counts for
13 papers
Charge and spin gaps of the ionic Hubbard model with density-dependent hopping
Oscar A. Moreno Segura, Karen Hallberg, Armando A. Aligia
We calculate the charge gap and the spin gap of the ionic Hubbard chain including electron-hole symmetric density-dependent hopping. The vanishing of ()…
State-of-the-art techniques for calculating spectral functions in models for correlated materials
K. Hallberg, D. J. García, Pablo S. Cornaglia +2
The dynamical mean field theory (DMFT) has become a standard technique for the study of strongly correlated models and materials overcoming some of the limitations of density funct…
Quantum phase transition between one-channel and two-channel Kondo polarons
Julian Rincon, Daniel J. Garcia, K. Hallberg +1
For a mobile spin-1/2 impurity, coupled antiferromagnetically to a one-dimensional gas of fermions, perturbative ideas have been used to argue in favor of two-channel Kondo behavio…
Interplay between quantum interference and Kondo effects in nonequilibrium transport through nanoscopic systems
P. Roura-Bas, L. Tosi, A. A. Aligia +1
We calculate the finite temperature and non-equilibrium electric current through systems described generically at low energy by a singlet and \emph{two} spin doublets for and $…
Quantum interference in coherent molecular conductance
Julian Rincon, K. Hallberg, S. Ramasesha
Coherent electronic transport through individual molecules is crucially sensitive to quantum interference. Using exact diagonalization techniques, we investigate the zero-bias and…
Improved parallelization techniques for the density matrix renormalization group
Julian Rincon, D. J. Garcia, K. Hallberg
A distributed-memory parallelization strategy for the density matrix renormalization group is proposed for cases where correlation functions are required. This new strategy has sub…