91 citations · 133 across the 6 of their papers we have counts for
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Quantum spin chains with various defects
C. Schuster, U. Eckern
Using the density matrix renormalization group (DMRG) method, we study the quantum coherence in one-dimensional disordered Fermi systems. We consider in detail spinless fermions on…
Theory of electrons with orbital degeneracy
You-Quan Li, U. Eckern
The Hubbard model for electrons with orbital degeneracy is shown to have an underlying SU_d(4) symmetry of spin-orbital double. A hidden charge SU_c(4) symmetry is exposed and an e…
Ghost spins and novel quantum critical behavior in a spin chain with local bond-deformation
Jian-Hui Dai, Yupeng Wang, U. Eckern
We study the boundary impurity-induced critical behavior in an integrable SU(2)-invariant model consisting of an open Heisenberg chain of arbitrary spin- (Takhatajian-Babujian m…
Anderson-localization versus delocalization of interacting fermions in one dimension
P. Schmitteckert, T. Schulze, C. Schuster +2
Using the density matrix renormalization group algorithm, we investigate the lattice model for spinless fermions in one dimension in the presence of a strong interaction and disord…