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VOLUME 84, NUMBER 19 P H Y S I C A L R E V I E W L E T T E R S 8 MAY 2000 Two Time Scales and Violation of the Fluctuation-Dissipation Theorem
 

Summary: VOLUME 84, NUMBER 19 P H Y S I C A L R E V I E W L E T T E R S 8 MAY 2000
Two Time Scales and Violation of the Fluctuation-Dissipation Theorem
in a Finite Dimensional Model for Structural Glasses
Federico Ricci-Tersenghi,1,
* Daniel A. Stariolo,2,
and Jeferson J. Arenzon2,
1
Abdus Salam International Center for Theoretical Physics, Condensed Matter Group, Strada Costiera 11, P.O. Box 586,
34100 Trieste, Italy
2
Instituto de Fisica, Universidade Federal do Rio Grande do Sul, CP 15051, 91501-970 Porto Alegre RS, Brazil
(Received 16 December 1999)
We study the breakdown of fluctuation-dissipation relations between time-dependent density-density
correlations and associated responses following a quench in the chemical potential in the frustrated
Ising lattice gas. The corresponding slow dynamics is characterized by two well-separated time scales
characterized by a constant value of the fluctuation-dissipation ratio. This result is particularly relevant
since activated processes dominate the long-time dynamics of the system.
PACS numbers: 75.10.Nr, 05.50.+q, 75.40.Gb, 75.40.Mg
In recent years considerable progress has been achieved
in the theoretical description of the glassy state of mat-

  

Source: Arenzon, Jeferson J. - Instituto de Física, Universidade Federal do Rio Grande do Sul
Ricci Tersenghi, Federico - Dipartimento di Fisica, Università di Roma "La Sapienza"
Stariolo, Daniel Adrián - Instituto de Física, Universidade Federal do Rio Grande do Sul

 

Collections: Materials Science; Physics