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Observable Dependent Quasi-Equilibrium in Slow Dynamics | | Peter Mayer
; Peter Sollich
; | | Date: |
31 May 2004 | | Journal: | Phys. Rev. E 71, 046113 (2005) DOI: 10.1103/PhysRevE.71.046113 | | Subject: | Statistical Mechanics | cond-mat.stat-mech | | Abstract: | We present examples demonstrating that quasi-equilibrium fluctuation-dissipation behavior at short time differences is not a generic feature of systems with slow non-equilibrium dynamics. We analyze in detail the non-equilibrium fluctuation-dissipation ratio X(t,tw) associated with a defect-pair observable in the Glauber-Ising spin chain. It turns out that $X
eq 1$ throughout the short-time regime and in particular X(tw,tw) = 3/4 for $tw o infty$. The analysis is extended to observables detecting defects at a finite distance from each other, where similar violations of quasi-equilibrium behaviour are found. We discuss our results in the context of metastable states, which suggests that a violation of short-time quasi-equilibrium behavior could occur in general glassy systems for appropriately chosen observables. | | Source: | arXiv, cond-mat/0405711 | | Other source: | [GID 690904] pmid15903732 | | Services: | Forum | Review | PDF | Favorites | |
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