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7 papers · 1 filter
Magnetic translations for a spatially periodic magnetic field
Wojciech Florek
It is shown that in the case of free electron in a spatially periodic magnetic field the concept of magnetic translations operators is still valid and, moreover, these operators ca…
Cooling-rate effects in a model of (ideal?) glass
A. Lipowski, D. Johnston
Using Monte Carlo simulations we study cooling-rate effects in a three-dimensional Ising model with four-spin interaction. During coarsening, this model develops growing energy bar…
Oscillatory behaviour in a lattice prey-predator system
Adam Lipowski
Using Monte Carlo simulations we study a lattice model of a prey-predator system. We show that in the three-dimensional model populations of preys and predators exhibit coherent pe…
Extended bound states of fermions on 2D square lattice beyond the nn hopping and interactions
Maciej Bak, Roman Micnas
We examine extended bound states in the dilute limit of the extended Hubbard model with next-nearest-neighbour (nnn) hopping and nnn interactions on the two dimensional square latt…
The Ashkin-Teller neural network near saturation
D. Bolle, P. Kozlowski
The thermodynamic and retrieval properties of the Ashkin-Teller neural network model storing an infinite number of patterns are examined in the replica-symmetric mean-field approxi…
Shot noise in ferromagnetic single electron tunneling devices
B. R. Bulka, J. Martinek, G. Michalek +1
Frequency dependent current noise in ferromagnetic double junctions with Coulomb blockade is studied theoretically in the limit of sequential tunneling. Two different relaxation pr…