162 citations · 1k across the 26 of their papers we have counts for
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Bose glass and Mott insulator phase in the disordered boson Hubbard model
J. Kisker, H. Rieger
We study the Villain representation of the two-dimensional disordered boson Hubbard model via Monte Carlo simulations. It is shown that the probability distribution of the local su…
Density Profiles in Random Quantum Spin Chains
F. Igloi, H. Rieger
We consider random transverse-field Ising spin chains and study the magnetization and the energy-density profiles by numerically exact calculations in rather large finite systems (…
Ground state properties of solid-on-solid models with disordered substrates
H. Rieger, U. Blasum
We study the glassy super-rough phase of a class of solid-on-solid models with a disordered substrate in the limit of vanishing temperature by means of exact ground states, which w…
Vortex lines in the three-dimensional XY model with random phase shifts
M. S. Li, T. Nattermann, H. Rieger +1
The stability of the ordered phase of the three-dimensional XY-model with random phase shifts is studied by considering the roughening of a single stretched vortex line due to the…
The One-Dimensional ANNNI model in a Transverse Field: Analytic and numerical study of Effective Hamiltonians
H. Rieger, G. Uimin
We consider a spin- chain with competing nearest and next-nearest neighbor interactions within a transverse magnetic field, which is known to be an equiavelent to the…