49 citations · 94 across the 5 of their papers we have counts for
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Minimal model for the frustrated spin ladder system BiCuPO
Leanna Splinter, Nils A. Drescher, Holger Krull +1
To establish the microscopic model of the compound BiCuPO is a challenging task. Inelastic neutron scattering experiments showed that the dispersion of this material is non…
From Gapped Excitons to Gapless Triplons in One Dimension
Mohsen Hafez Torbati, Nils A. Drescher, Götz S. Uhrig
Often, exotic phases appear in the phase diagrams between conventional phases. Their elementary excitations are of particular interest. Here, we consider the example of the ionic H…
Dispersive Excitations in the One-Dimensional Ionic Hubbard Model
M. Hafez Torbati, Nils A. Drescher, Götz S. Uhrig
A detailed study of the one-dimensional ionic Hubbard model with interaction is presented. We focus on the band insulating (BI) phase and the spontaneously dimerized insulating…
Enhanced Perturbative Continuous Unitary Transformations
H. Krull, N. A. Drescher, G. S. Uhrig
Unitary transformations are an essential tool for the theoretical understanding of many systems by mapping them to simpler effective models. A systematically controlled variant to…
Truncation errors in self-similar continuous unitary transformations
Nils A. Drescher, Tim Fischer, Götz S. Uhrig
Effects of truncation in self-similar continuous unitary transformations (S-CUT) are estimated rigorously. We find a formal description via an inhomogeneous flow equation. In this…