Observable-dependence of fluctuation-dissipation relations and effective temperatures

Details Observable-dependence of fluctuation-dissipation relations and effective temperatures Observable-dependence of fluctuation-dissipation relations and effective temperatures

2001-07-31

arxiv.org/abs/cond-mat/0107627v1

Phys.Rev.Lett.88,050603(2002)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.88.050603

We study the non-equilibrium version of the fluctuation-dissipation theorem (FDT) within the glass phase of Bouchaud's trap model. We incorporate into the model an arbitrary observable m and obtain its correlation and response functions in closed form. A limiting non-equilibrium FDT plot (of correlator vs response) is approached at long times for most choices of m, with energy-temperature FDT a notable exception. In contrast to standard mean field models, however, the shape of the plot depends nontrivially on the observable, and its slope varies continuously even though there is a single scaling of relaxation times with age. Non-equilibrium FDT plots can therefore not be used to define a meaningful effective temperature T_eff in this model. Consequences for the wider applicability of an FDT-derived T_eff are discussed.

Affiliated with

Also associated with

No associations

Rating

Observable-dependence of fluctuation-dissipation relations and effective temperatures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Observable-dependence of fluctuation-dissipation relations and effective temperatures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observable-dependence of fluctuation-dissipation relations and effective temperatures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-359918