43 citations · 357 across the 22 of their papers we have counts for
9 papers · 1 filter
Slow dynamics and local quasi-equilibrium. Relaxation in supercooled colloidal systems
J. M. Rubi, I. Santamaria-Holek, A. Perez-Madrid
We present a Fokker-Planck description of supercooled colloidal systems exhibiting slow relaxation dynamics. By assuming the existence of a local quasi-equilibrium state during the…
A Mesoscopic Approach to the ``Negative'' Viscosity Effect in Ferrofluids
A. Perez Madrid, T. Alarcon, J. M. G. Vilar +1
We present a mesoscopic approach to analyze the dynamics of a single magnetic dipole under the influence of an oscillating magnetic field, based on the formulation of a Fokker-Plan…
Periodic Modulation Induced Increase of Reaction Rates in Autocatalytic Systems
T. Alarcon, A. Perez-Madrid, J. M. Rubi
We propose a new mechanism to increase the reactions ratesin multistable autocatalytic systems. The mechanism is based upon the possibility for the enhancement of the response of t…
Stochastic Resonance in Nonpotential Systems
T. Alarcon, A. Perez-Madrid, J. M. Rubi
We propose a method to analytically show the possibility for the appearance of a maximum in the signal-to-noise ratio in nonpotential systems. We apply our results to the FitzHugh-…
Low Temperature Viscosity in Elongated Ferrofluids
T. Alarcon, A. Perez-Madrid, J. M. Rubi
We have studied the relaxation and transport properties of a ferrofluid in an elongational flow. These properties are influenced by the bistable nature of the potential energy. Bis…
Stochastic Resonance in a Dipole
J. M. G. Vilar, A. Pérez-Madrid, J. M. Rubí
We show that the dipole, a system usually proposed to model relaxation phenomena, exhibits a maximum in the signal-to-noise ratio at a non-zero noise level, thus indicating the app…
Non-equilibrium thermodynamics of thermionic emission processes in abrupt semiconductor junctions, including the effects of surface states
G. Gomila, A. Perez-Madrid, J. M. Rubi
The methods of non-equilibrium thermodynamics of systems with an interface have been applied to the study of thermionic emission processes in abrupt semiconductor junctions, includ…
Brownian motion in the presence of a temperature gradient
A. Perez-Madrid, J. M. Rubi, P. Mazur
By considering an ensemble of Brownian particles suspended in a heat bath as a thermodynamic system with an internal degree of freedom it is possible to obtain the Fokker-Planck eq…
Stochastic resonance in a system of ferromagnetic particles
A. Perez-Madrid, J. M. Rubi
We show that a dispersion of monodomain ferromagnetic particles in a solid phase exhibits stochastic resonance when a driven linearly polarized magnetic field is applied. By using…