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Aging in ferromagnetic systems at criticality near four dimensions

Calabrese, Pasquale
•
Gambassi, Andrea
2002
  • journal article

Periodico
PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS
Abstract
We study the off-equilibrium response and correlation functions and the corresponding fluctuation-dissipation ratio for a purely dissipative relaxation of an O(N) symmetric vector model (model A) below its upper critical dimension. The scaling behavior of these quantities is analyzed and the associated universal functions are determined at first order in epsilon=4-d in the high-temperature phase and at criticality. A nontrivial limit of the fluctuation-dissipation ratio is found in the aging regime X(infinity)=1/2(1-(epsilon/4)(N+2)/(N+8))+O(epsilon(2)).
DOI
10.1103/PhysRevE.65.066120
WOS
WOS:000176762900027
Archivio
http://hdl.handle.net/20.500.11767/13630
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-45849155197
http://journals.aps.org/pre/abstract/10.1103/PhysRevE.65.066120
https://arxiv.org/abs/cond-mat/0203096
Diritti
closed access
Scopus© citazioni
65
Data di acquisizione
Jun 15, 2022
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Web of Science© citazioni
64
Data di acquisizione
Mar 26, 2024
Visualizzazioni
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Data di acquisizione
Apr 19, 2024
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