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Artículo
Residual properties of a two-level system
(American Institute of Physics Publising LLC, 1991)
The residual properties, after cooling from a high temperature to T=0 K, of a system of identical and independent two-level systems are analyzed. A general criterion to know whether a given cooling law will lead to a ...
Artículo
Dynamical behavior of a one-dimensional Ising model submitted to continuous heating and cooling processes
(American Institute of Physics Publising LLC, 1994)
The evolution of a one-dimensional Ising model with Glauber dynamics and an extrinsic energy barrier, submitted to continuous cooling and heating processes, is studied. The model is shown to exhibit many of the properties ...
Artículo
Memory effects in the relaxation of ising models
(IOP Publishing Ltd., 2002)
It is analytically shown that the one-dimensional Ising model with Glauber dynamics exhibits short-time memory effects when submitted to an abrupt change in temperature. These effects are qualitatively similar to those ...
Artículo
Aging in the one-dimensional Ising model with Glauber dynamics
(IOP Publishing Ltd., 1997-10-01)
We study the zero-temperature limit of the one-dimensional Ising model with nearest-neighbor interactions and Glauber dynamics. An exact evolution equation is derived for the spin-spin two-time correlation functions following ...
Artículo
Simple model with facilitated dynamics for granular compaction
(American Physical Society, 1999)
A simple lattice model is used to study compaction in granular media. As in real experiments, we consider a series of taps separated by large enough waiting times. The relaxation of the density exhibits the characteristic ...
Artículo
Glassy behavior in a simple model with entropy barriers
(American Physical Society, 1997)
We study the dynamical behavior of a system with a variable number of particles n. The empty state n=0 is the ground state, while all the other states n>0 are degenerate in energy. In equilibrium, the mean number of particles ...
Artículo
Hysteresis in vibrated granular media
(Elsevier, 2000)
Some general dynamical properties of models for compaction of granular media based on master equations are analyzed. In particular, a one-dimensional lattice model with short-ranged dynamical constraints is considered. The ...