The ratchet effect in an ageing glass

Giacomo Gradenigo, Alessandro Sarracino, Dario Villamaina, Tomás S Grigera, Andrea Puglisi
2010 Journal of Statistical Mechanics: Theory and Experiment  
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 subvelocity of the intruder grows with $T_{eff}/T$, where $T_{eff}$ is defined by the response-correlation ratio, corresponding to a
more » ... orresponding to a general behavior of thermal ratchets when in contact with two thermal reservoirs.
doi:10.1088/1742-5468/2010/12/l12002 fatcat:ardunogxkze4nmemrboelyypza