Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 2191
Articles: 1'906'541
Articles rated: 2570

23 October 2019
 
  » arxiv » cond-mat/0111241

  Article overview


Fluctuation-dissipation relations and effective temperatures in simple non-mean field systems
P Sollich ; S Fielding ; P Mayer ;
Date 13 Nov 2001
Journal Journal of Physics: Condensed Matter, 14:1683-1696, 2002 DOI: 10.1088/0953-8984/14/7/324
Subject Statistical Mechanics; Disordered Systems and Neural Networks; Soft Condensed Matter | cond-mat.stat-mech cond-mat.dis-nn cond-mat.soft
AbstractWe give a brief review of violations of the fluctuation-dissipation theorem (FDT) in out-of-equilibrium systems; in mean field scenarios the corresponding fluctuation-dissipation (FD) plots can, in the limit of long times, be used to define a {em effective temperature} $ eff$ that shares many properties of the true thermodynamic temperature $T$. We discuss carefully how correlation and response functions need to be represented to obtain meaningful limiting FD plots in {em non-mean field} systems. A minimum requirement on the resulting effective temperatures is that they should be independent of the observable whose correlator and response are being considered; we show for two simple models with glassy dynamics (Bouchaud’s trap model and the Glauber-Ising chain at zero temperature) that this is generically not the case. Consequences for the wider applicability of effective temperatures derived from FD relations are discussed; one intriguing possibility is that at least the limit of the FDT violation factor for well separated times may generically be observable-independent and so could yield a meaningful $ eff$.
Source arXiv, cond-mat/0111241
Services Forum | Review | PDF | Favorites   
 
Visitor rating: did you like this article? no 1   2   3   4   5   yes

No review found.
 Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

  Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser CCBot/2.0 (https://commoncrawl.org/faq/)






ScienXe.org
» my Online CV
» Free


News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2019 - Scimetrica