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- Centre National de la Recherche ScientifiqueFR238 papers
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53 papers · 1 filter
Theory for the Doping Dependence of Spin Fluctuation Induced Shadow States in High-T Superconductors
M. Langer, J. Schmalian, S. Grabowski +1
We analyze the doping dependence of the intensity and energetical position of shadow states in high -T superconductors within the 2D Hubbard model and using our recently deve…
Ising Spins on a Gravitating Sphere
Christian Holm, Wolfhard Janke
We investigated numerically an Ising model coupled to two-dimensional Euclidean gravity with spherical topology, using Regge calculus with the path-integral measure to discr…
Measuring the string susceptibility in 2D simplicial quantum gravity using the Regge approach
Christian Holm, Wolfhard Janke
We use Monte Carlo simulations to study pure 2D Euclidean quantum gravity with -interaction on spherical topologies, employing Regge's formulation. We attempt to measure the s…
Critical Properties of the One-Dimensional Forest-Fire Model
A. Honecker, I. Peschel
The one-dimensional forest-fire model including lightnings is studied numerically and analytically. For the tree correlation function, a new correlation length with critical expone…
Non-Perturbative versus Perturbative Renormalization of Lattice Operators
M. Göckeler, R. Horsley, E. -M. Ilgenfritz +5
Our objective is to compute the moments of the deep-inelastic structure functions of the nucleon on the lattice. A major source of uncertainty is the renormalization of the lattice…
A new approach for perovskites in large dimensions
J. Schmalian, P. Lombardo, M. Avignon +1
Using the Hubbard Hamiltonian for transition metal-3d and oxygen-2p states with perovskite geometry, we propose a new scaling procedure for a nontrivial extension of these systems…