Effects of an external drive on the fluctuation-dissipation relation of phase-ordering systems

, , and

2002 EDP Sciences
, , Citation F. Corberi et al 2002 EPL 60 425 DOI 10.1209/epl/i2002-00281-7

0295-5075/60/3/425

Abstract

The relation between the autocorrelation C(t,tw) and the integrated linear response function χ(t,tw) is studied in the context of the large-N model for phase-ordering systems subjected to a shear flow. In the high-temperature phase T > Tc a non-equilibrium stationary state is entered which is characterized by a non-trivial fluctuation-dissipation relation χ(ttw) = tilde chi(C(ttw)). For quenches below Tc the splitting of the order parameter field into two statistically independent components, responsible for the stationary Cst(ttw) and aging Cag(t/tw) part of the autocorrelation function, can be explicitly exhibited in close analogy with the undriven case. In the regime ttw << tw the same relation χ(ttw) = tilde chi(Cst(ttw)) is found between the response and Cst(ttw), as for T > Tc. The aging part of χ(t,tw) is negligible for tw, as without drive, resulting in a flat χ(C) in the aging regime ttw >> tw.

Export citation and abstract BibTeX RIS

10.1209/epl/i2002-00281-7