INVESTIGADORES
GRIGERA Tomas Sebastian
artículos
Título:
The ratchet effect in an ageing glass
Autor/es:
GRADENIGO, G.; SARRACINO, A.; VILLAMAINA, D.; GRIGERA, T. S.; PUGLISI, A.
Revista:
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
Editorial:
IOP PUBLISHING LTD
Referencias:
Año: 2010 vol. 2010 p. 12002 - 12002
ISSN:
1742-5468
Resumen:
We study the dynamics of an asymmetric intruder in a glass-former
model. At equilibrium, the intruder diffuses with average zero
velocity. After an abrupt quench to T deeply under the mode-coupling
temperature, a net average drift is observed, steady on a logarithmic
time scale. The phenomenon is well reproduced in an asymmetric version
of the Sinai model. The sub-velocity of the intruder grows with T eff /
T , where T eff is defined by the response/correlation ratio,
corresponding to a general behavior of thermal ratchets when in contact
with two thermal reservoirs.