7 papers · 1 filter
Ratchets in homogeneous extended systems: internal modes and the role of noise
Angel Sanchez, Luis Morales-Molina, Franz G. Mertens +3
We revisit the issue of directed motion induced by zero average forces in extended systems driven by ac forces. It has been shown recently that a directed energy current appears if…
Extinction in population dynamics
C. Escudero, J. Buceta, F. J. de la Rubia +1
We study a generic reaction-diffusion model for single-species population dynamics that includes reproduction, death, and competition. The population is assumed to be confined in a…
Comprehensive study of phase transitions in relaxational systems with field-dependent coefficients
J. Buceta, Katja Lindenberg
We present a comprehensive study of phase transitions in single-field systems that relax to a non-equilibrium global steady state. The mechanism we focus on is not the so-called St…
Dynamics of Two Granules
Alexandre Rosas, J. Buceta, Katja Lindenberg
We study the dynamics of two particles that interact only when in contact. In this sense, although not in every particular, the interactions mimic those in granular materials. The…
Outbreaks of Hantavirus induced by seasonality
C. Escudero, J. Buceta, F. J. de la Rubia +1
Using a model for rodent population dynamics, we study outbreaks of Hantavirus infection induced by the alternation of seasons. Neither season by itself satisfies the environmental…
Spatial Patterns Induced Purely by Dichotomous Disorder
J. Buceta, Katja Lindenberg
We study conditions under which spatially extended systems with coupling a la Swift-Hohenberg exhibit spatial patterns induced purely by the presence of quenched dichotomous disord…