106 citations · 203 across the 6 of their papers we have counts for
4 papers · 1 filter
Effective Models for the Anderson Impurity and the Kondo Model from Continuous Unitary Transformations
Jörn Krones, Götz S. Uhrig
The method of continuous unitary transformations (CUTs) is applied to the Anderson impurity and the Kondo model aiming at the systematic derivation of convergent effective models.…
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…
Field-induced Tomonaga-Luttinger liquid phase of a two-leg spin-1/2 ladder with strong leg interactions
Tao Hong, Y. H. Kim, C. Hotta +10
We study the magnetic-field-induced quantum phase transition from a gapped quantum phase that has no magnetic long-range order into a gapless phase in the spin-1/2 ladder compound…
Derivation of the t-J model for finite doping
Simone A. Hamerla, Sebastian Duffe, Götz S. Uhrig
Mapping complex problems to simpler effective models is a key tool in theoretical physics. One important example in the realm of strongly correlated fermionic systems is the mappin…