1.1k citations · 4.5k across the 114 of their papers we have counts for
6 papers · 1 filter
Spectral signatures of Holstein polarons
Holger Fehske, Andreas Alvermann, Martin Hohenadler +1
We review numerical results for ground-state and spectral properties of the single-electron Holstein model.
Hole doped Hubbard ladders
H. Fehske, G. Hager, G. Wellein +1
The formation of stripes in six-leg Hubbard ladders with cylindrical boundary conditions is investigated for two different hole dopings, where the amplitude of the hole density mod…
Optical response of many-polaron systems
G. Wellein, A. R. Bishop, M. Hohenadler +2
Exact results for the density of states and the ac conductivity of the spinless Holstein model at finite carrier density are obtained combining Lanczos and kernel polynomial method…
Many-polaron problem by cluster perturbation theory
Martin Hohenadler, Gerhard Wellein, Andreas Alvermann +1
The carrier-density dependence of the photoemission spectrum of the Holstein many-polaron model is studied using cluster perturbation theory combined with an improved cluster diago…
Optical absorption and activated transport in polaronic systems
G. Schubert, G. Wellein, A. Weiße +2
We present exact results for the optical response in the one-dimensional Holstein model. In particular, by means of a refined kernel polynomial method, we calculate the ac and dc e…
The Kernel Polynomial Method
Alexander Weisse, Gerhard Wellein, Andreas Alvermann +1
Efficient and stable algorithms for the calculation of spectral quantities and correlation functions are some of the key tools in computational condensed matter physics. In this ar…