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38 papers · 1 filter
Griffiths Singularities in the Disordered Phase of a Quantum Ising Spin Glass
H. Rieger, A. P. Young
We study a model for a quantum Ising spin glass in two space dimensions by Monte Carlo simulations. In the disordered phase at , we find power law distributions of the local s…
Raman scattering in a two-layer antiferromagnet
Dirk K. Morr, Andrey V. Chubukov, Arno P. Kampf +1
Two--magnon Raman scattering is a useful tool to verify recent suggestions concerning the value of the interplanar exchange constant in antiferromagnetic two--layer systems, such a…
On the localization transition in three dimensions: Monte-Carlo simulation of a non-linear -model
Thomas Dupré
We present a combination of analytical and numerical calculations for the critical behavior of a supersymmetric non-linear -model within the context of the localization transiti…
Two Lane Traffic Simulations using Cellular Automata
Marcus Rickert, Kai Nagel, Michael Schreckenberg +1
We examine a simple two lane cellular automaton based upon the single lane CA introduced by Nagel and Schreckenberg. We point out important parameters defining the shape of the fun…
Strong coupling probe for the Kardar-Parisi-Zhang equation
T. J. Newman, Harald Kallabis
We present an exact solution of the {\it deterministic} Kardar-Parisi-Zhang (KPZ) equation under the influence of a local driving force . For substrate dimension we re…
Ferromagnetism in the Hubbard model on the square lattice: Improved instability criterion for the Nagaoka state
P. Wurth, G. Uhrig, E. Mueller-Hartmann
The instability of the fully polarized ferromagnetic state (Nagaoka state) with respect to single spin flips is re-examined for the Hubbard model on the square lattice with a large…