Anomalous aging phenomena caused by drift velocities
Service de Physique Théorique,
CEA Saclay - 91191 Gif-sur-Yvette cedex, France
2 ICTP - Strada Costiera 11, 34100 Trieste, Italy, and S. N. Bose National Centre for Basic Sciences, Block JD Sector 3 Salt Lake, Calcutta 700098, India
Accepted: 26 March 2001
We demonstrate via several examples that a uniform drift velocity gives rise to anomalous aging, characterized by a specific form for the two-time correlation functions, in a variety of statistical-mechanical systems far from equilibrium. Our first example concerns the oscillatory phase observed recently in a model of competitive learning. Further examples, where the proposed theory is exact, include the voter model and the Ohta-Jasnow-Kawasaki theory for domain growth in any dimension, and a theory for the smoothing of sandpile surfaces.
PACS: 05.70.Ln – Nonequilibrium and irreversible thermodynamics
© EDP Sciences, 2001