5 papers
Spin Quantum Hall Effect: the Critical Exponents
Hrant Topchyan, Win Nuding, Andreas Klümper +1
The spin quantum Hall effect (SQHE) provides one of the few examples of an Anderson localization transition for which exact critical exponents are known, making it an important tes…
Chiral eigenbases of the XX and XY quantum spin chains
Xin Zhang, Frank Göhmann, Andreas Klümper +1
We calculate the values of observables in chiral eigenstates of the XX quantum spin chain that were introduced in previous work and compare the form of the result with the respecti…
Non-linear integral equations for the XXX spin-1/2 quantum chain with non-diagonal boundary fields
Holger Frahm, Andreas Klümper, Dennis Wagner +1
The XXX spin- Heisenberg chain with non-diagonal boundary fields represents a cornerstone model in the study of integrable systems with open boundaries. Despite its si…
Managing Singular Kernels and Logarithmic Corrections in the Staggered Six-Vertex Model
Mouhcine Azhari, Andreas Klümper
In this paper, we investigate the spectral properties of the staggered six-vertex model with symmetry for arbitrary system sizes using non-linear integral equation…
Exact spectral function and nonequilibrium dynamics of the strongly interacting Hubbard model
Ovidiu I. Patu, Andreas Klumper, Angela Foerster
Analytical results on the correlation functions of strongly correlated many-body systems are rare in the literature and their importance cannot be overstated. We present determinan…