Communications in Mathematical Physics

, Volume 282, Issue 3, pp 663–695

Universality of the REM for Dynamics of Mean-Field Spin Glasses

Authors

  • Gérard Ben Arous
    • Courant Institute of the Mathematical SciencesNew York University
  • Anton Bovier
    • Weierstrass Institute for Applied Analysis and Stochastics
    • Mathematics InstituteBerlin University of Technology
    • Department of MathematicsETH Zürich
Article

DOI: 10.1007/s00220-008-0565-7

Cite this article as:
Arous, G.B., Bovier, A. & Černý, J. Commun. Math. Phys. (2008) 282: 663. doi:10.1007/s00220-008-0565-7

Abstract

We consider a version of Glauber dynamics for a p-spin Sherrington– Kirkpatrick model of a spin glass that can be seen as a time change of simple random walk on the N-dimensional hypercube. We show that, for all p ≥ 3 and all inverse temperatures β > 0, there exists a constant γβ ,p > 0, such that for all exponential time scales, exp(γ N), with γ < γβ ,p, the properly rescaled clock process (time-change process) converges to an α-stable subordinator where α = γ/β2 < 1. Moreover, the dynamics exhibits aging at these time scales with a time-time correlation function converging to the arcsine law of this α-stable subordinator. In other words, up to rescaling, on these time scales (that are shorter than the equilibration time of the system) the dynamics of p-spin models ages in the same way as the REM, and by extension Bouchaud’s REM-like trap model, confirming the latter as a universal aging mechanism for a wide range of systems. The SK model (the case p = 2) seems to belong to a different universality class.

Copyright information

© Springer-Verlag 2008