185 citations · 315 across the 6 of their papers we have counts for
11 papers
Deciding the fate of the false Mott transition in two dimensions by exact quantum Monte Carlo methods
D. Rost, N. Blümer
We present an algorithm for the computation of unbiased Green functions and self-energies for quantum lattice models, free from systematic errors and valid in the thermodynamic lim…
Tunable nanomagnetism in moderately cold fermions on optical lattices
E. V. Gorelik, N. Blümer
Localized defects, unavoidable in real solids, may be simulated in (generically defect-free) cold-atom systems, e.g., via modifications of the optical lattice. We study the Hubbard…
Fate of the false Mott-Hubbard transition in two dimensions
T. Schäfer, F. Geles, D. Rost +6
We have studied the impact of non-local electronic correlations at all length scales on the Mott-Hubbard metal-insulator transition in the unfrustrated two-dimensional Hubbard mode…
Discriminating antiferromagnetic signatures in ultracold fermions by tunable geometric frustration
Chia-Chen Chang, Richard T. Scalettar, Elena V. Gorelik +1
Recently, it has become possible to tune optical lattices continuously between square and triangular geometries. We compute thermodynamics and spin correlations in the correspondin…
Quasi continuous-time impurity solver for the dynamical mean-field theory with linear scaling in the inverse temperature
D. Rost, F. Assaad, N. Blümer
We present an algorithm for solving the self-consistency equations of the dynamical mean-field theory (DMFT) with high precision and efficiency at low temperatures. In each DMFT it…
Orbital-selective Mott transitions in a doped two-band Hubbard model with crystal field splitting
E. Jakobi, N. Blümer, P. G. J. van Dongen
We investigate the effects of crystal field splitting in a doped two-band Hubbard model with different bandwidths within dynamical mean-field theory (DMFT), using a quantum Monte C…