1.8k citations · 2.8k across the 29 of their papers we have counts for
29 papers
Ground state properties of two spin models with exactly known ground states on the square lattice
A. Sindermann, U. Löw, J. Zittartz
We introduce a new two-dimensional model with diagonal four spin exchange and an exactly knownground-state. Using variational ansaetze and exact diagonalisation we calculate upper…
Asymmetric localization in disordered Landau bands
A. Aldea, M. Nita
We show that due to the Landau band mixing the eigenstate localization within the disordered bands get an asymmetric structure: the degree of localization increases in the lower pa…
Triplet superconductivity in a 1D itinerant electron system with transverse spin anisotropy
C. Dziurzik, G. I. Japaridze, A. Schadschneider +2
In this paper we study the ground state phase diagram of a one-dimensional t-J-U model away from half-filling. In the large-bandwidth limit and for ferromagnetic exchange with easy…
Exact ground states of quantum spin-2 models on the hexagonal lattice
Marc Andre Ahrens, Andreas Schadschneider, Johannes Zittartz
We construct exact non-trivial ground states of spin-2 quantum antiferromagnets on the hexagonal lattice. Using the optimum ground state approach we determine the ground state in d…
Excitations of anisotropic spin-1 chains with matrix product ground state
E. Bartel, A. Schadschneider, J. Zittartz
We investigate a large class of antiferromagnetic spin-1 chains with nearest neighbour interaction and exactly known matrix product ground state. The spectrum of low-lying excitati…
Stochastic Light-Cone CTMRG: a new DMRG approach to stochastic models
A. Kemper, A. Gendiar, T. Nishino +2
We develop a new variant of the recently introduced stochastic transfer-matrix DMRG which we call stochastic light-cone corner-transfer-matrix DMRG (LCTMRG). It is a numerical meth…